ILLUSTRATED INDEX
OF
BRITISH SHELLS.
CONTAINING
FIGURES OF ALL THE RECENT SPECIES,
With Names and other Information.
BY
G. B. SOWERBY, F.L.S.
LONDON:
SIMPKIN, MARSHALL, AND CO., PATERNOSTER ROW;
AND
THE AUTHOR, 9, PEMBROKE SQUARE, KENSINGTON.
1859.
* * * * *
PREFACE.
The first idea of this Work arose from the occasional use of Mr. Damon's
'Catalogue of the Shells of Great Britain and Ireland,' named after the
'History of British Mollusca,' etc. Here was, on one side, a very useful
list of names, without figures or references to guide an inquirer to the
species; and on the other, a very large and splendid Work, placed by its
heavy price beyond the reach of Naturalists in general. There was nothing
between the two; nothing within reach that would assist collectors of
British Shells to name their acquisitions from ocean, beach, river, pond,
or hedgerow. A public want seemed here to be discovered. It was thought
that a list like the above, with a coloured drawing of every species, if
produced at an available price, would supply that want. At first no more
than this was thought of, but afterwards, as the preparations advanced,
various suggestions were made tending to some extension of the plan. The
results are here presented.
About 700 Figures in the Plates represent all the recognized species. They
amount to 600, being 60 more than are admitted in the latest monograph. The
greater part of these are either new or newly introduced as British. The
rest are raised from varieties to species.
As the nomenclature used by Messrs. Forbes and Hanley in their great Work
will be most generally adopted in this country, it is followed here with
very few alterations; and the synonyms given (in italics) are selected from
those which are most familiar and likely to be met with.
Some information is added respecting habits and localities, range of depth
of marine species, and comparative abundance. The letters C., Cc., Mc., R.,
Rr., and Mr., signifying 'common,' 'extremely common,' 'moderately common,'
'rare,' etc., must be taken with great caution, especially the latter, as
subject to continual change.
A list is given of British Fossil Shells identical with now living species.
A familiar description of British Mollusca and some peculiarities in their
families and genera will, it is hoped, form a useful and suitable
introduction to the names and figures. The Author's best thanks are due to
his friends, Madame De Burgh, who has collected many beautiful shells; R.
McAndrew, Esq., F.L.S., whose dredging experiences are so extensive; J. G.
Jeffreys, Esq., F.R.S., etc., whose researches have resulted in so many
additions to our Fauna; Mr. Brice Wright, the Naturalist, of Great Russell
Street, and others, who have in the most liberal manner supplied him with
specimens from which his drawings are taken. The loan of delicate and
minute shells to authors and artists has so often proved disastrous, that
nothing but a generous friendship, and a zealous love of Natural History,
could have induced proprietors so freely to incur the risk.
* * * * *
INTRODUCTION
TO
SHELL-BEARING BRITISH MOLLUSCA.
A common garden Snail, observed crawling and feeding, is easily seen to
possess a distinct head, upon which are four feelers or horns, with eyes at
the end, and underneath which is a mouth; a broad disc, extending the whole
length of the body, is the organ of locomotion; a spiral or coiled shell
surmounts the whole.
If, on the other hand, an Oyster be opened, no distinct head, or place for
eyes or mouth, can be seen, but only a seeming mass of pulp, with a round
gristle in the centre (the muscle of attachment), the former enclosed in a
soft skin with a double fringe round the edge (mantle), placed within a
shell composed of two pieces.
All Mollusca are more or less completely represented by these two. The
Snail and its class are named _Gasteropoda_ (abdomen-creeping), and their
shells _Univalves_; the Oyster and its class, _Acephala_ (headless), and
their shells _Bivalves_. We begin with the latter class at--
PLATE I.
_Pholadidæ_, or "Borers," 1-13, have the power of piercing and inhabiting
holes in submarine wood, rocks, and stones. The hinder part of the body is
lengthened out in the form of a double tube, with openings for the ingress
and egress of fluids. _Teredo_, 1-6, has short valves, two pallets fixed at
the sides of the siphons, and lines its hole with a shelly tube. _Pholas_
and _Pholadidea_, 8-13, have long valves and sometimes accessory plates.
The shell of _Xylophaga_, 7, is like that of _Teredo_, but the animal has
neither pallets nor tube.
_Gastrochæna_, 14, has a gaping shell, and encloses itself in a
bottle-shaped covering of cemented stones and sand. _Saxicava_, 15, 16,
_Venerupis_, 18, and _Petricola_, 17, burrow in sand, or live in holes of
rocks.
_Myadæ_, or "Gapers," _Mya_, 19, 20, and _Panopæa_, 21, 21*, burrow
downwards in sand and mud, their siphons protected by a coriaceous
covering. Their shells are not closed all round, and those of _Mya_ have a
spoon-shaped process in the hinge of one valve.
_Corbulidæ_, 22-28, have short siphons with fringed edges, and the foot
protrudes through a hole in the otherwise closed mantle.
PLATE II.
_Poromya_, 1, 1*, and the beautiful pearly _Pandora_, 2, 3, might be
included in the family of _Corbulidæ_. _Lyonsia_, 4, and _Thracia_, 5-10,
represent the _Anatinidæ_. 11-18 are _Solenidæ_, or "Razor-shells." Solens
burrow in deep holes in the sand, where they remain in a perpendicular
position at a great depth below the surface, where yet their presence may
be traced by the opening left. Their large muscular foot enables them to
take great leaps when out of the holes.
PLATE III.
_Psammobia_, 1-4, and _Tellina_, 5-16, include some of our most beautiful
shells. The animals have a large, fleshy, curved foot, and the mantle open
and fringed. Their shells are provided with an external ligament, and teeth
on the hinge. _Donax_, or "Wedge," 19, 20, has long, separated, fringed
siphons. Besides the small external ligament, properly so called, the
_Mactridæ_ have a triangular pit in the hinge of their shell, containing an
elastic substance or spring, designed to resist the action of the adductor
muscles. _Mactra_, 21-26, ends the Plate.
PLATE IV.
_Lutraria_, 1-3, is another genus of _Mactridæ_. The _Veneridæ_, 4-16 and
23, or "Venus" tribe, differ from it in not having the spring-holding pit.
_Artemis_, 10, 11, is known by a large angular bend in the pallial
impression; and _Cytherea_, 23, is distinguished from Venus by one tooth on
the hinge standing out a little way from the central ones. _Astarte_,
17-22, belongs to the _Cyprinidæ_.
PLATE V.
Fig. 1-3 also represent genera of _Cyprinidæ_. They have no bend in the
palleal impression. _Cardium_, or "Cockle," 4-13, presents a peculiarity in
the foot, which is large and bent, and enables the animal to leap in a very
lively manner. The family of _Lucinidæ_ occupy the remaining figures.
_Lucina_ has a curious tongue-shaped doubling of the pallial impression.
PLATE VI.
The _Kelliadæ_, 1-15, are marine, while the _Cycladidæ_, completing the
Plate, are fresh-water bivalves, and may be found in many ponds and rivers.
PLATE VII.
Of the _Unionidæ_, or "Fresh-water Mussels," _Unio_, 1-3, has teeth on the
hinge, and _Anodon_, 4, has not: it is a thin shell. The foot of these
molluscs is very large, and is used in cutting the animal's way through the
mud in which it burrows. Of the marine, or true Mussels, _Modiola_, 6-9,
and _Crenella_, 12-17, have a portion of the shell reaching beyond the
point or apex, which in _Mytilus_ is terminal, 18-21. _Dreissina_, 5, is
shaped like _Mytilus_, but lives in fresh-water docks. The _Mytilidæ_
attach themselves by means of horny threads spun from the foot, and called
a "byssus."
PLATE VIII.
Shells of _Arcadæ_, 1-14, have the hinge characterized by a series of teeth
on each side of the apex. _Nucula_, _Arca_, and _Pectunculus_ are easily
distinguished. _Limopsis_, 14, has a spring pit between the two rows. Our
figure of _Pinna_, 16, is from a young specimen: it grows to great size,
and spins a very silky byssus. The shell of _Anomia_, 18, is fixed to
rocks, etc., by means of a bony button passing through a hole or sinus in
the lower valve. _Lima_, 22-24, has a light, thin shell, and its mantle is
adorned with beautiful fringes. It swims rapidly through the water by the
opening and shutting of its valves, and also has the habit, in seasons of
rest, of protecting itself by a network or vest of marine fragments strung
together by its byssal threads.
PLATE IX.
Contains the shells of our Pectens, or Scallops, 1-16. The animals swim
like _Lima_, as above, and also spin a byssus.
The class _Brachiopoda_, 17-24, so named because what seem to be organs of
locomotion consist of a pair of coiled, ciliated arms, ends the list of
Headless Molluscs and their bivalve shells.
PLATE X.
Class _Pteropoda_, 1-4, contains minute Mollusca, with glassy shells
variously formed, and wing-like expansions for swimming.
_Chiton_, 5-17, or "Coat of Mail," which may often be seen incrusting
rocks, commences the _Gasteropoda_; although seemingly fixed, they are
capable of locomotion, using the whole of the oval disc, which may be seen
on turning them over, for the purpose. The same may be said of the "Limpet"
tribe, _Patella_, 1-22.
PLATE XI.
This Plate commences with other forms of the Limpet tribe, _Fissurella_, 1,
2, with a hole at the top; _Puncturella_, 3, with a fissure near the top;
and _Emarginula_, 4-6, with a slit at the margin. _Haliotis_, 7, or pearly
"Ear-shell," leads to the _Trochidæ_, or "Tops," 8-27.
PLATE XII.
_Ianthina_, 1-4, is genus of oceanic molluscs, which are provided with a
beautiful floating apparatus, on which the female carries her egg-bags.
_Neritina_, 5, and the _Paludinidæ_, 8-11, live in fresh-water. The animal
of _Paludina_ is sprinkled all over with bright, golden specks. The
_Littorinæ_, or "Winkles," 12-24, are marine, and frequent the shore among
seaweeds. _Lacuna_, 25-32, belongs to the same family.
PLATE XIII., XIV.
Are small genera, various in their characters and habits, but reasonably
included in the last family, _Littorinidæ_.
PLATE XV.
The animals of _Turritella_, 1-3, and _Cæcum_, 6, 7, are not unlike,
although the shells are so different; eyes at the base of the tentacles, a
short foot, and horny operculum. The somewhat similar animal of
_Aporrhais_, 4, 5, is brilliantly coloured with gold and red. _Cerithium_,
8-10, differs from _Cerithiopsis_, 11-15, more in regard to the animal than
the shell; the latter animal has a retractile proboscis, and its operculum
is not spiral.
PLATE XVI.
_Chemnitzia_, 1-11, and _Truncatella_, 12, together with _Stylifer_,
_Eulima_, and _Odostomia_, form the family of _Pyramidellidæ_.
Notwithstanding the difference in the shells, the animals are very similar,
having a retractile proboscis, and eyes immersed at the base of their
tentacles.
The animal of _Natica_, 13-19, has a lobe on the upper part of the foot,
reflected over the shell in front, and another lobe behind. The shells of
_Laminaria_, 23, 24, are completely enveloped in similar lobes.
PLATE XVII.
The shells of _Odostomia_ are known by a fold in the inner lip of the
aperture.
PLATE XVIII.
Two _Tritons_, 1, 2, are admitted for the first time as British, on what we
consider fair evidence, although only two or three specimens have been
taken off Guernsey. One of _T. nodiferus_ was incrusted by a truly British
_Lepralia_. _Murex_, 3, is now familiar as an aquarian, as well as
_Purpura_, 5. A milky secretion found in the head turns purple when
exposed, and gives the celebrated purple dye. _Buccinum_, 7-13, includes
the common "Whelk," 8. _Fusus Berniciensis_, 14, is among the rarest and
most beautiful of our British shells.
PLATE XIX.
_Nassa reticulata_, 3, is a favourite inhabitant of the tank; it burrows in
search of food among the pebbles, elevating its siphon above the surface.
_Mangelia_, 4-26, has a similar long siphon. The shell of _Erato_, 27, is
wrapped in the lobes of the animal's mantle, as is also that of _Cyprea_,
28, the latter presenting a beautiful object.
PLATE XX.
After _Tornatella_, 1, and _Ovula_, 2, 3, come _Bullidæ_, 4-27, including
several genera differing remarkably in the shape and disposition of the
lobes of their mantles, which in some instances, as in _Philine_, 20-25,
cover the shell. The stomach of _Scapander_, 26, 27, is a remarkable kind
of mill, composed of two bones, between which the food is ground. The
shells of _Aplysia_, 28, and _Pleurotranchus_, 29, 30, are quite internal.
_Spirula_, 31, belonging to the Cephalopodous or Cuttlefish tribe, is only
introduced doubtfully, as there is no proof of the species living in our
seas.
PLATE XXI., XXII., XXIII., XXIV.
These are occupied by shells of _Gasteropoda pulmonifera_, so named because
they breathe air by a pulmonary cavity, instead of water by gills. The
_Limnæadæ_, or fresh-water Snails, contained in Plate I., live in water,
but breathe by exposing the pulmonary cavity to air at the surface.
_Succinea_, Plate XXII., 1-3, lives by the sides of streams, sometimes
immersed. _Conovulus_, 4-7, affects brackish marshes. Our common Slugs
yield, on dissection, thin shells, which are concealed beneath the mantle,
_Limax_, 9-12. The shells of _Testacellus_, 13, 14, are fixed near the end
of the foot, outside. The glassy shells of _Vitrina_, 15, 16, do not
enclose the whole Slug-like animal. The other genera of Land Snails have
shells large enough to receive the animal when retracted and withdrawn for
repose.
* * * * *
BRITISH FOSSIL SHELLS.
The following living species are also found in a fossil state in drift and
strata of the British Isles. They are all enumerated in Mr. Searles Wood's
monograph of the CRAG Mollusca.
The numbers refer to the species as figured in our Plates, Mr. Wood's
nomenclature being inserted in italics when differing from ours.
Pl. I. Teredo 2. Pholas 11. Pholadidea 12. Gastrochæna 14, as _dubia_.
Saxicava 15, 16. Venerupis 18. Mya 19, 20. Panopea 21, 21*, as _Faujasii_.
Corbula 22, 23? Sphænia 25. Neæra 27.
Pl. II. Poromya 1. Pandora 2, as _inæquivalvis_, 3, as _pinna_. Thracia 7,
8. Solen, 13, 15. Solecurtus 18, as _Mactra strigilata_. Syndosmya, as
_Abra_, 19, 22.
Pl. III. Psammobia 1, 3, 4. Tellina 5, 6, 7, 9, as _ovata_, 15, as
_Balthica_, 16. Scrobicularia 18, as _Trigonella plana_. Donax 19, as
_vittatus_. Mactra 20, 21, 22, as _ovalis_, 23, 25, 26.
Pl. IV. Lutraria 2. Tapes 7, 8. Artemis 11. Venus 12, 14, 15, 17. Astarte
18, 19, 20, 22, as _borealis_.
Pl. V. Cyprina 1. Circe 2. Isocardia 3. Cardium 6, 8, 9, 12, 13. Lucina 14,
as _Loripes_, 15, as _Cryptodon flexuosum_, 16. Diplodonta 19. Clausina 20,
as _Cryptodon f._
Pl. VI. Montacuta 1, 2, 3. Kellia 5, 6. Poronia 7, as _Kellia r._ Cyclas
16, 18. Pisidium 23, 24, 25, 26.
Pl. VII. Unio 2, 3. Anodon 4. Modiola 6, 9, 10. Crenella 13, 14, 15, 16.
Mytilus 18, 19, 20.
Pl. VIII. Nucula 1, 5. Leda 6, 7. Area 9, 10, 11, as _pectunculoides_.
Pectunculus 13. Avicula 15. Pinna 16. Ostrea 17. Anomia 18, 19, 20, 21.
Lima 22, 23, 24.
Pl. IX. Pecten 1, 2, 5, 8, 9, 10, 11, 12, 13, 14.
Pl. X. Chiton 7, as _fascicularis_. Patella 18. Acme 23. Propilidium, as
_Tectura_, 24. Dentalium 26, 27. Capulus 28. Calyptræa 29.
Pl. XI. Fissurella 1, as _græca_. Puncturella 3. Emarginula 5, 6. Trochus
8, 10, 11, 12, as _papillosus_, 15, 16, 17, 19. Margarita 21. Adeorbis 25.
Scissurella 26.
Pl. XII. Paludina 9. Valvata 10. Littorina 14. Lacuna 27.
Pl. XIII. Rissoa 3*, as _Paludestrina subumbilicata_, 7, 11?, 13?, 15, 23,
27.
Pl. XIV. Rissoa 2, 9, as _Chemnitzia_. Aclis 24, as _Alvania ascaris_, 25,
as _Chemnitzia n._
Pl. XV. Turritella 2. Aporrhais 4. Cæcum 6, 7. Cerithium 9, 10.
Cerithiopsis, as _Cerithium_, 11. Scalaria 17, 19, 20. Eulima 22, 25.
Pl. XVI. Chemnitzia 1, 2, as _similis_, 4, 8. Natica 13, 17, as _Catena_,
19, as _Groenlandica_. Velutina 21. Trichotropis 26.
Pl. XVII. Odostomia 1, 8, as _plicata_, 9, as _plicata_, 10?, 12.
Pl. XVIII. Purpura 5. Buccinum 10? Fusus 15, as _Trophon_, 16, as _Tr._,
17, as _Tr. gracile_, 18, as _Tr. T._, 19, as _Tr. p._ Trophon 22, 24.
Pl. XIX. Nassa 1, 2. Mangelia, as _Clavatula_, 4, 5, 8, as _Philberti_, 9,
11, as _Boothii_, 12, 14, 15, 17?, 21, 22. Erato 27. Cypræa 28.
Pl. XX. Tornatella 1, as _Actæon tornatilis_. Ovula 3, as _Bulla_.
Cylichna, as _Bulla_, 4, 5, as _regulbiensis_, 7, 9, 12. Bulla 19. Philine
as _Bullæa_, 21, 22. Scaphander, as _Bulla_, 26.
Pl. XXI. Limnæa 1, 4, 7, 11. Planorbis 18, 24, as _complanatus_, and in the
upper fresh-water formation, all except 9, 11.
Pl. XXII. Succinea 1, 3. Conovulus 5, and in the more recent fresh-water
deposits, all except 7 and 13 to 16.
Pl. XXIII. Helix 19, 22, and upper fresh-water, all except 1, 12, 14, 15,
24, 25, 26.
Pl. XXIV. Upper fresh-water deposits, all except 16, 24.
* * * * *
INDEX TO THE GENERA.
Referring to Plates and Figures.
Achatina, XXIV. 24.
Aclis, XIV. 23, 25.
Acmæa, X. 22, 23.
Acme, XXIV. 26.
Adeorbis, XI. 25.
Akera, XX. 16.
Amphispira, XX. 14, 15.
Ancylus, XXI. 14-17.
Anodonta, VII. 4.
Anomia, VIII. 18-21.
Aplysia, XX. 28.
Aporrhais, XV. 4, 5.
Arca, VIII. 18-12.
Argiope, IX. 20, 23.
Artemis, IV. 10, 11.
Assiminea, XIII. 1, 2.
Astarte, IV. 17, 22.
Avicula, VIII. 15.
Azeca, XXIV. 23.
Balea, XXIV. 17.
Barleeia, XIV. 12.
Bithinea, XII. 6, 7.
Buccinum, XVIII. 8-13.
Bulla, XX. 17-19.
Bulimus, XXIV. 1-4.
Calyptræa, X. 29.
_Capulus_, Pileopsis.
Cardium, V. 4-13.
Carychium, XXII. 8.
Cæcum, XV. 6-7.
_Cemoria_, Puncturella.
Ceratisolen, II. 11.
Cerithiopsis, XV. 11-15.
Cerithium, XV. 8-10.
Chemnitzia, XVI. 1-11.
Chiton, X. 5-17.
Circe, V. 2.
_Clavatula_, Mangelia.
Clausilia, XXIV. 18-21.
Clausina, V. 20-22.
Cochlodesma, II. 10.
Conovulus, XXII. 4-7.
Corbula, I. 22-24.
Crania, IX. 24.
Crenella, VII. 12-17.
Cyclostoma, XXIV. 25.
Cyclas, VI. 16-20.
Cylichna, XX. 4-13.
Cypræa, XIX. 28.
Cyprina, V. 1.
Cytherea, IV. 23.
Dentalium, X. 26, 27.
Diodonta, II. 16, 16*.
Diplodonta, V. 19.
Donax, III. 19, 20.
Dreissina, VII. 5.
Emarginula, XI. 4-6.
Euomphalus, XIV. 17, 18.
Ervillia, III. 17.
Eulima, XV. 22-26.
Eulimella, XIV. 26-30.
Fissurella, XI. 1, 2.
Fusus, XVIII. 14-19.
Galeomma, VI. 14, 15.
Gastrochæna, I. 14.
Haliotis, XI. 7.
_Helix_ (Zonites), XXII. 17-29.
Helix, XXIII. 1-29.
_Hinnites_, Pecten, IX. 1.
Hippothyris, IX. 17.
Hyalæa, X. 1.
Ianthina, XII. 1-4.
Isocardia, V. 3.
Jeffreysia, XIV. 13-16.
Kellia, VI. 5-8.
Lachesis, XVIII. 6.
Lacuna, XII. 25-32.
Lamellaria, XVI. 23, 24.
Leda, VIII. 6, 7.
Lepton, VI. 9-13.
Lima, VIII. 22-24.
Limax, XXII. 9-12.
Limnæa, XXI. 1-11.
Limopsis, VIII. 14.
Littorina, XII. 12-24.
Lucina, V. 14-18.
Lucinopsis, IV. 9.
Lutraria, IV. 1-3.
Lyonsia, II. 4.
Mactra, III. 21-26.
Mangelia, XIX. 4-26.
Margarita, XI. 21-24.
_Marginella_, Erato.
_Megathyris_, Argiope.
Modiola, VII. 6-11.
Montacuta, VI. 1-3.
Murex, XVIII. 3, 4.
Mya, I. 19-20.
Mytilus, VII. 18-21.
Nassa, XIX. 1-3.
Natica, XVI. 13-19.
Neæra, I. 26-28.
Neritina, XII. 5.
Nucula, VIII. 1-5.
Odostomia, XVII. 1-31.
Ostrea, VIII. 17.
Otina, XVI. 25.
Ovula, XX. 2, 3.
Paludina, XII. 8, 9.
Pandora, II. 2, 3.
Panopæa, I. 21, 21*.
Patella, X. 18-21.
Pecten, IX. 1-16.
Pectunculus, VIII. 13.
Petricola, I. 17.
Phasianella, XI. 27.
Philine, XX. 20-25.
Pholas, I. 8-11, 13.
Pholadidea, I. 12.
Physa, XXI. 12, 13.
Pileopsis, X. 28.
Pilidium, X. 24.
Pinna, VIII. 16.
Pisidium, VI. 21-28.
Planorbis, XXI. 18-28.
Pleurobranchus, XX. 29.
_Pleurotoma_, Mangelia.
Poromya, II. 1, 1*, IX.
Propilidium, X. 25.
Psammobia, III. 1-4.
Puncturella, XI. 3.
Pupa, XXIV. 5-16.
Purpura, XVIII. 5.
Recluzia, XVI. 20.
Rissoa, XIII. 3-28; XIV.
Saxicava, I. 15, 16.
Scalaria, XV. 16-20.
Scaphander, XX. 26, 27.
Scrobicularia, III. 18.
Scissurella, XI. 26.
_Segmentina_, Planorbis, XXI. 27, 28.
Skenea, XIV. 19-22.
Solen, II. 12-15.
Solecurtus, II. 17, 18.
Spirialis, X. 2-4.
Spirula, XX. 31.
Stylifer, XV. 21.
Succinea, XXII. 1-3.
Syndosmya, II. 19-22.
Sphænia, I. 25.
Tapes, IV. 4-8.
Tellina, III. 5-16.
Terebratula, IX. 18-20.
Teredo, I. 1-6.
Testacellus, XXII. 13, 14.
Thracia, II. 5-9.
Tornatella, XX. 1.
Trichotropis, XVI. 26.
Triton, XVIII. 1, 2.
Trochus, XI. 8-20.
Trophon, XVIII. 20-24.
Truncatella, XVI. 12.
Turritella, XV. 1-3.
Turtonia, VI. 4.
Unio, VII. 1-3.
Valvata, XII. 10, 11.
Velutina, XVI. 21, 22.
Venerupis, I. 18.
Venus, IV. 12-16.
_Vertigo_, Pupa.
Vitrina, XXII. 15-16.
Xylophaga, I. 7.
Zonites, XXII. 17-29.
Zua, XXIV. 22.
[Illustration: BRITISH SHELLS. PLATE I.]
PLATE I.
TEREDO. Pierces and inhabits wood.
Fig.
1. T. NAVALIS, _Linn._--_T. Batavæ._--Herne Bay, R. Pallets shelly,
crescented; valves with auricles extended sidewise; tube long.
2. T. NORVEGICA, _Spengl._--_T. Bruguieri._--Port Patrick, Teignmouth,
etc., Mc. Pallets shelly, not crescented; auricles not extended.
3. T. MEGOTARA, _Hanl._--_T. nana_ (young).--Herne Bay, Devon, Swansea,
etc., R. Pallets shelly, spade-shaped; auricles raised and expanded.
4. T. BIPENNATA, _Turt._--Ireland, Scarborough, etc., R. Pallets horny,
long; auricles lobed.
5. T. MALLEOLUS, _Turt._--Torquay, Rr. Pallets shelly, mallet-shaped;
valves narrow.
6. T. PALMULATA, _Lamk._--_T. bipalmulata._--Floating wood, Ire., S. Eng.
Pallets horny, short; valves small, shaped like _T. navalis_.
XYLOPHAGA. In fixed and floating timber.
7. X. DORSALIS, _Turt._--Ayrs., Dubl., Exm., Scarb., etc., C. Two dorsal
plates, no tube, no pallets.
PHOLAS. Pierces and inhabits stone.
8. P. DACTYLUS, _Linn._--_P. hians_, _P. callosa_.--Eng., Scot., Ire., C.
Dorsal plates four; hinge pitted.
9. P. CANDIDA, _Linn._--Eng., Scot., Ire., C. One dorsal plate; valves not
beaked.
10. P. PARVA, _Penn._--_P. callosa_, _P. tuberculata_.--Salcombe, Belfast,
Cornwall, etc., M. C. One dorsal plate; valves beaked.
11. P. CRISPATA, _Linn._--_P. bifrons._--Hastings, Liverp., Scarb., Dubl.,
Forth, etc., C. No dorsal plate; valves broad, beaked, with oblique
division.
13. P. STRIATA. Rare and doubtful as British. Valves closed.
PHOLADIDEA. Pierces and inhabits stone.
12. P. PAPYRACEA, _P. Loscombiana_, _P. Goodalli._--S. Devon, N. Ire., R.
Valves closed, with a cup. _P. lamellata_, Turt., when young, not closed;
no cup.
GASTROCHÆNA. Bores and inhabits stone, thick shells, etc.
14. G. MODIOLINA, _Lamk._--_G. Pholadia_, _G. hians_, _Mya dubia_, _Mytilus
ambiguus_, _Pholas faba_.--Torbay, Birterbuy, Galway, Weymouth, etc. Valves
thin, gaping, enclosed in bottle-shaped tube.
SAXICAVA. Bores and inhabits stone.
15. S. RUGOSA, _Linn._--_Mytilus r._, _Hiatella r._, _S. gallicana_, _S.
pholadis_, _Byssomya pholadis_, _Mya byssifera_.--Eng., Scot., Ire., C.
Valves oval.
16. S. ARCTICA, _Linn._--(_Mya_) _Hiatella a._, _Anatina a_., _Hiatella
minuta_, _Solen minutus_, _S. rhomboides_, _Agina purpurea_, _Solen
p._--Eng., Scot., Ire., C. Valves rhomboidal; angle serrated.
_Omitted._--S. fragilis, _Nyst._ _Not_ the young of _S. rugosa_. Vigo Bay.
PETRICOLA. Inhabits stone.
17. P. LITHOPHAGA, _Retz._--_P. striata_, _costellata_, _rocellaria_,
_ruperella_, Lamk., _Mya_ and _Sphænia decussata_.--Cork, Bristol, R. as
British.
VENERUPIS. Bores and inhabits stone.
18. V. IRUS, _Linn._ (Donax).--_Tellina cornubiensis_, _Cuneus foliaceus_,
_Petric._, and _Pullastra_, I.--In limestone at Plymouth and other southern
coasts. Wedge-shaped.
MYA. Burrows in mud and sand.
19. M. TRUNCATA, _Linn._--_M. ovalis_ and _Sphænia Swainsoni_
(young).--Various localities and depths, C. Truncated at end.
20. M. ARENARIA, _Linn._--Herne Bay, Portsmouth, etc., C. Tapering at end.
PANOPÆA. Burrows in mud.
21. P. NORVEGICA, _Spengl._--_P. glycimeris_, _P. arctica_.--Scarborough,
Zetland (90 fath.), Rr. Quadrate.
21*. P. ALDROVANDI, _Lamk._--Cornwall, one specimen, _Jeffreys_. Oblique.
CORBULA. Dredged in mud and sand.
22. C. NUCLEUS, _Lamk._--_C. striata_, _Mya_, and _C.
inæquivalvis_.--Dublin, Torquay, Forth, 4 to 80 fath., C. Valves unequal,
beaked.
23. C. ROSEA, _Brown_.--Weymouth, Rr. as Brit. Valves not beaked.
24. C. OVATA, _Forbes_.--Isle of Man, Rr. Oval, truncated at end.
SPHÆNIA. Burrows in foliaceous shells.
25. S. BINGHAMI, _Turt._--_Corbula B._--Torquay, Guernsey, Swansea, Forth,
etc., R.
NEÆRA. Lives incrusted in sand.
26. N. COSTELLATA, _Desh._--_Corbula c._, _N. sulcata_.--Loch Fyne, Rr.
Radiately 3-ribbed.
27. N. CUSPIDATA, _Olivi_.--Forth, Northumberland, Cape Clear, etc., Mr.
Pear-shaped.
28. N. ABBREVIATA, _Forbes_.--Loch Fyne, Mc. Radiately 1-ribbed.
[Illustration: BRITISH SHELLS. PLATE II.]
PLATE II.
POROMYA. On mud, in deep water.
Fig.
1. P. GRANULATA, _Nyst._--_P. anatinoides_, Forbes.--Skye, R.
1*. P. SUBTRIGONA, _Jeffreys_.--Shetland, Mr. Minute, posteriorly
expanded. See Pl. IX.
PANDORA.
2. P. ROSTRATA, _Lamk._--_Tellina inæquivalvis_, Linn.; _P. margaritacea_
and _inæquivalvis_.--S. Devon?, Guernsey, R. as Brit. Valves long.
3. P. OBTUSA, _Leach_.--_Solen Pinna_, Mont.--S. Devon, Dorset, Mc. Ire.,
R. Valves short and broad.
LYONSIA. With byssal attachment.
4. L. NORVEGICA, _Chemn._--_Mya_ and _Anatina n._, _Mya_ and _Anatina
striata_, _M. nitida_, _Lyonsia elongata_, _Myatella_, and
_Osteodesma_.--Tenby, Bantry, Oban, etc., 5 to 80 fath. With movable
ossicle on hinge.
THRACIA. Laminarian and Coralline.
5. T. DISTORTA, _Mont._--(_Mya_) _Anatina_ and _Amphidesma d._, _Th.
truncata_.--Distribution general, but not common. Short, truncated,
irregular.
6. T. CONVEXA, _Wood_.--(_Mya_) _Anatina_ and _Amphidesma c._, _T.
declivis_.--S. Devon, Bantry Bay, Arran, etc., Mc. Inflated.
7. T. PHASEOLINA, _Lamk._--_Amphidesma p._, _T. declivis_.--Various
localities and depths, C. Oval, obliquely truncated.
8. T. PUBESCENS, _Pult._--(_Mya_) _Anatina_ and _Amphidesma p._, _T.
declivis_.--S. Devon, Cornwall, Belfast, etc., C. Oblong, straightly
truncated.
9. T. VILLIOSULCA, _Macgillivray_.--_T. ovata_, Brown.--Exmouth, Swansea,
Bantry Bay, etc. Various depths, Mc.
COCHLODESMA. Laminarian and Coralline.
10. C. PRÆTENUE, _Pult._--(_Mya_) _Anatina_, _Ligula_, and _Amphidesma
pr._--Dorset, Devon, Man, Bantry B., Oban, etc., (25 to 60 fath.), R.
Spoon-shaped process on hinge.
CERATISOLEN. Burrows in sand.
11. C. LEGUMEN, _Linn._--(_Solen_) _Psammoiia_ and _Solenicurtus
l._--Exmouth, Swansea, Bantry, etc., C. Hinge nearly central.
SOLEN. Burrows perpendicularly in sand.
12. S. PELLUCIDUS, _Penn._--Various British localities, 6 to 100 fath.
Curved; hinge not terminal.
13. S. ENSIS, _Linn._--Eng., Scot., Ire., generally 5 to 15 fath., C.
Arched and slender.
14. S. MARGINATUS, _Pult._--_S. vagina_, Penn., not Linn.--Exmouth, Clyde,
Cork, etc., littoral to 10 fath., Mc. Straight, with terminal constriction.
15. S. SILIQUA, _Linn._--_S. novacula_, _S. ligula_.--Eng., Scot., Ire.,
many places; littoral and laminarian, C. Straight, end not constricted.
DIODONTA.
16. D. FRAGILIS, _Linn._--(_Tellina_) _Psammobia f._, _Tellina jugosa_ and
_ochroleuca_.--Dublin, Tenby, Weymouth, R. Oval or wedge-shaped.
16*. D. BARLEEI, _Jeffr._--Arran, Rr. Minute, subquadrate.
SOLECURTUS.
17. S. COARCTATUS, _Gmel._--_S. cultellus_, _S. emarginatus_, _S.
antiquatus_, etc.--Torbay, Anglesea, Man, Skye, etc., R. Oblong, smooth.
18. S. CANDIDUS, _Renieri._--(_Solen_) _S. strigilatus_, Turt., not Linn.,
_Psammobia scopula_.--S. Devon, Dublin, etc., R. Striated.
SYNDOSMYA.
19. S. PRISMATICA, _Mont._--(_Ligula_) _Mya_ and _Amphidesma p._--Weymouth,
Forth, Dublin, Antrim, etc., littoral, Mc. More pointed and narrow than _S.
intermedia_.
20. S. TENUIS, _Mont._--(_Mactra_) _Amphidesma t._--Dorset, Scarborough,
Antrim, etc., 5 to 100 fath., Mc. Short, subtrigonal.
21. S. INTERMEDIA, _Thompson._--_Mya_ and _Syndosmya nitida_, _Abra
profundissima_.--In mud, 6 to 100 fath., Zetland, Skye, Cape Clear, etc.,
R. Broader and more pointed than _S. prismatica_.
22. S. ALBA, _Wood._--(_Mactra_) _M._ and _Amphidesma Boysii_ and _A.
album_.--Brit. co. generally, C. Short, rounded, oval.
[Illustration: BRITISH SHELLS. PLATE III.]
PLATE III.
PSAMMOBIA. Inhabits sand and mud.
Fig.
1. P. FERROENSIS, _Chemn._--(_Tellina_) _T. incarnata_, _T. radiata_, _T.
trifasciata_, _T. truncata_.--Brit. co. generally; coralline, C. Oblong,
keeled and angulated behind.
2. P. COSTULATA, _Turt._--_P. discors._--Torbay, Cornwall, Skye, etc., R.
Ribbed behind.
3. P. TELLINELLA, LAMK.--_P. florida._--Exmouth, Guernsey, Tenby, Bantry
B., Oban, Zetland, etc., 5 to 50 fath., C. Oval, smooth.
4. P. VESPERTINA, _Chemn._--(_Lux V._) _Solen_, _Sanguinolaria V._,
_Tellina depressa_, _variabilis_.--Weymouth, Scarborough, Tenby, Bantry,
etc., Guernsey, C. Not angular nor keeled behind.
TELLINA.
5. T. CRASSA, _Penn._--_T. maculata_, _T. rigida_.--S. Devon, Guernsey,
Man, Tenby, Bantry, Forth, etc., low-water to 15 fath., C. Thick,
orbicular.
6. T. BALAUSTINA, _Linn._--Birterbuy, Skye, Exmouth, Rr. as British.
7. T. DONACINA, _Linn._--_T. trifasciata_, _T. variegata_, _T.
Llantivyi_.--Various British loc., and S. Europe, 5 to 50 fath., C.
Wedge-shaped.
8, 9. T. PROXIMA, _Brown._--Var. _T. calcarea_ (9), _T. ovalis_, _T.
sordida_, _Sanguinolaria sordida_, _Macroma tenera_.--Skye, etc., R.
10, 11. T. PYGMÆA, _Phil._--Devon, Cork, Shetland, etc., 8 to 50 fath., C.
Smaller, more convex, and more truncate than _T. donacina_.
12, 13. T. TENUIS, _Da Costa._--_T. planata_, _T. polita_, _T. exigua_.--On
sandy shores, in various localities, C. Flat, thin.
14. T. INCARNATA, _Linn._--_T. squalida_, _T. depressa_.--Devon, Bantry,
Tenby, R. Flat, beaked.
15. T. SOLIDULA, _Pult._--_T. rubra_, Da Costa, _T. carnaria_, _T. zonata_,
_Psammobia solidula_, _T. Balthica_.--All British coasts; littoral, C.
Thick, inflated.
16. T. FABULA, _Gronovius._--_T. discors._--On sandy shores generally, C.
Valve with oblique striæ (omitted by error).
ERVILLIA.
17. E. CASTANEA, _Mont._--(_Donax_) _Mesodesma c._, _Capsa c._--Cornwall
and Scilly Isles, R. Ligament within.
SCROBICULARIA.
18. S. PIPERITA, _Gmel._--Generic syn.: _Mya_, _Venus_, _Trigonella_,
_Mactra_, _Lutraria_, _Listera_.--Specific syn.: _hispanica_, _borealis_,
_plana_, _gaditana_, _Listeri_, _compressa_.--Scarborough, Southend,
Swansea, Cork, Clyde, C. Broad, compressed.
DONAX.
19. D. ANATINUS, _Lamk._--_D. trunculus_, Linn.?, _Cuneus vittatus_, _D.
ruber_ (young).--Brit. co. generally, sandy shores, C. Broad; margin
crenulated.
20. D. POLITUS, _Poci._--(_Tellina_) _D._ and _Capsa complanata_.--S.
Devon, Bantry Bay, etc., Mr. Smooth; inner edge not crenated.
MACTRA. Lives on sandy beaches.
21. M. STULTORUM, _Linn._--(_Cardium_) _Tellina radiata_, _Trigonella r._,
_M. cinerea_, _M. magna_.--British co. generally, C.
22. M. ELLIPTICA, _Brown._--British co. generally, C. Oval.
23. M. SUBTRUNCATA, _Costa._--_M. lactea_, _M. triangula_, _M.
crassatella_.--Brit. co. generally, C. Obliquely cuneiform.
24. M. HELVACEA, _Chemn._--_M. glauca_, _M. neapolitana_.--Odd valves found
dead in Cornwall, R. Large, obliquely oval.
25. M. SOLIDA, _Linn._--_Trigonella zonaria_ and _gallina_.--Brit. co.
generally, C. Trigonal, thick.
26. M. TRUNCATA, _Mont._--Forth, Cork, Cornwall, etc., C. Trigonal, deep,
thick.
[Illustration: BRITISH SHELLS. PLATE IV.]
PLATE IV.
LUTRARIA. Inhabits mud.
Fig.
1. L. INTERMEDIA?, _Sowb._--Perhaps only the young of _L. elliptica_.
2. L. ELLIPTICA, _Lamk._--_Mactra lutraria_, Linn.--Scarborough, Torbay,
Dublin, Forth, Lerwick, etc., C. Broad, oval.
3. L. OBLONGA, _Chemn._--(_Mya_) _L. solenoides_, _L. hians_, _Mactra
hians_, _Chama magna_.--Cornwall, Devon, etc., Mc. Arched, narrow.
TAPES. Burrows in mud and stone.
4, 5. T. PULLASTRA, _Wood._--_Venus pullastra_, _V. perforans_ (var. f.
4), _Venerupis nucleus_, _Pullastra vulgaris_, etc.--Plymouth, Scarborough,
Swansea, Forth, etc., C.
6. T. DECUSSATA, _Linn._--(_Venus_) _V. litterata_, _V. florida_,
_Venerupis_ and _Pullastra d._--S. Devon, Weymouth, Tenby, etc., Mc.
Oblong, coarsely decussated.
7. T. AUREA, _Gmel._--(_Venus_) _V. nebulosa_, _V. ænea_, _V. nitens_, _V.
sinuata_, _Pullastra a._--Cornwall, Sussex, Bantry Bay, Loch Ryan, Mc.
Yellow within.
8. T. VIRGINEA, _Linn._--(_Venus_) _V. rhomboides_, _V. sarniensis_, _V.
virago_, _Cuneus fasciatus_.--Various British loc., C. Pink within.
LUCINOPSIS, _Forbes_ and _Hanley_. Sandy ground.
9. L. UNDATA, _Pennant._--(_Venus_) _V. sinuosa_, _V. incorrupta_, _Lucina
undata_.--Exm., Scarborough, Man, etc., 5 to 80 fathoms, M.R. Orbicular,
flexuous at side.
ARTEMIS.
10. A. EXOLETA, _Linn._--(_Venus_) _Cytherea e._, _Pectunculus
capillaceus_.--Sandy ground, on Brit. co. generally, low-water to 80 fath.,
C. Compressed; striæ coarse.
11. A. LINCTA, _Pult._--(_Venus_) _V. sinuata_, _Cytherea
sinuata_.--Various Brit, loc., C. Dorsal edge sloping; striæ fine.
VENUS.
12. V. CASINA, _Linn._--_V. reflexa_, _V. lactea_, _V.
discina_.--Northumberland, S. Devon, Man, Bantry, Skye, etc., Mc.
Concentrically laminated.
13. V. VERRUCOSA, _Linn._--_V. erycina_, _V. cancellata_, etc.--Devon,
Cornwall, Channel Isls., etc., C. Ventricose, warted.
14. V. FASCIATA, _Donov._--Various southern Brit, loc., C. Round, with
thick ribs.
15. V. OVATA, _Pennant._--Brit. co. generally, C. Oval, radiately ribbed.
16. V. STRIATA, _Donov._--_V. gallina_, _V. Pennantii_, _V. rugosa_.--Brit.
co. generally. Shores and deep water, C.
ASTARTE.
17. A. TRIANGULARIS, _Mont._--_Mactra_ and _Goodallia_, _minutissima_ and
_triangularis_.--Northern parts of Britain, 15 to 20 fathoms, C. Minute,
triangular.
18. A. ELLIPTICA, _Brown._--_Crassina e._, _Crassina ovata_, and _C.
sulcata_. Scotland, 5 to 10 fath., mud, M. C. Oblong, smooth near the
margin.
19. A. SULCATA, _Costa._--(_Pectunculus_) _V. scotica_ and _Damnoniensis_,
_Crassina sulcata_, etc.--Devon, Cornwall, Bantry, etc., C. Thickly ribbed.
20. A. COMPRESSA, _Mont._--(_Venus_) _Venus and Crassina Montagui_,
_Cyprina comp._--Scarborough, Northumbria, Bantry Bay, Firth of Forth, 7 to
40 fath., M. C.
21. A. CREBRICOSTATA, _Forbes._--Zetland and Skye (dead), R. Ribs more
numerous than in _A. sulcata_.
22. A. ARCTICA, _Gray._--(_Crassina_) _Venus borealis_, _Astarte
compressa_.--Aberdeen, Zetland, St. Andrew's bay, etc., Rr. Lenticular, not
ribbed.
CYTHEREA.
23. C. CHIONE, _Linn._--(_Venus._)--Plymouth, S. Devon, Falmouth,
Carnarvon, 12 to 20 fath., Mr.
[Illustration: BRITISH SHELLS. PLATE V.]
PLATE V.
CYPRINA.
Fig.
1. C. ISLANDICA, _Linn._ (_Venus._)--_C. vulgaris_, _V.
mercenaria_.--Brit. co. generally, most abundant north, 5 to 80 fath. Oval,
with thick epidermis.
CIRCE.
2. C. MINIMA, _Mont._ (_Venus._)--Gen. _Cyprina_ and _Cytherea
triangularis_, _apicialis_, _Cyrillii_, _minuta_.--Guernsey, Cornwall,
Milford Haven, Clyde, Bantry Bay, etc., 10 to 50 fath., C.
ISOCARDIA.
3. I. COR, _Linn._ (_Chama._)--_I. hibernica_, _Cardita cor._--Dublin,
Skye, etc., Mc. Heart-shaped, beaks coiled.
CARDIUM, or _Cockle_.
4. C. PYGMÆUM, _Donovan._--_C. exiguum._--Herne, Sark, Weymouth, Zetland,
Bantry Bay, 5 to 50 fath., Mc. Hinder side large, angular.
5. C. PAPILLOSUM, _Poli._--Guernsey, St. Martin's Port, _Jeffreys_, R.
Rather rounded, equally ribbed and grained.
6. C. PUNCTATUM, _Broc._, C. NODOSUM, _Turt._--_C. scabrum_, Ph.--Exmouth,
Falmouth, Galloway, etc., Mc. Angular behind.
7. C. FASCIATUM, _Mont._--_C. elongatum_, _C. ovale_, _C. parvum_, _C.
rubrum_ (young).--Various Brit. loc., Mr.
8. C. SUECICUM, _Loven._--_C. Swediense_, Reeve, _C. Loveni_,
Thompson.--Down, Oban, Zetland, 30 to 70 fath., Rr. Oval, equally ribbed.
9. C. ACULEATUM, _Linn._--_C. ciliare_ and _parvum_ (young).--S. Devon,
Mc. Thin, oblique, with thorn-like tubercles; interstices of ribs smooth.
10. C. RUSTICUM, _Linn._--_C. tuberculatum_, Linn.?--Paignton, Torbay,
Velvet Strand, Dublin co., Mc. Thick, not oblique, coarsely wrinkled.
11. C. ECHINATUM, _Linn._--_C. mucronatum_, _C. spinosum_.--Brit. co.
generally, mud and sand, 7 to 80 fath. Oblique, wrinkled; hinder tubercles
sharp.
12. C. EDULE, _Linn._--_C. vulgare_, _C. zonatum_, _C. obliquum_, _C.
crenulatum_, _C. rusticum_.--Brit. co. generally. Common eatable, Cockle.
13. C. NORVEGICUM, _Spengler._--_C. lævigatum_, _C. serratum_, _C.
oblongum_, _C. Pennantii_.--Brit. co. generally. Sand and gravel, 15 to 80
fath. Smooth, variegated when young.
LUCINA.
14. L. DIVARICATA, _Linn._ (_Tellina._)--_Cardium arcuatum_, _L. arcuata_,
_commutata_.--Near Falmouth, 20 fath., Rr. Rounded, with diverging ribs.
15. L. FLEXUOSA, _Mont._ (_Tellina._)--_Venus sinuosa_, _Amphidesma
flexuosa_, _L. sinuata_; gen. _Cryptodon_, _Axinus_, and
_Ptychina_.--Clyde, Bantry, Anglesea, etc., 7 to 80 fath., Mc. Thin, with a
fold behind.
16. L. BOREALIS, _Linn._ (_Venus._)--_Tellina radula_, _Lucina r._, _L.
alba_.--Many Brit. loc., 1 to 90 fath., C. Lenticular, concentrically
laminated.
17. L. LEUCOMA, _Turt._--_L. lactea_, not Linn., _Loripes lactea_.--Torbay,
Scarborough, Bantry Bay, etc., low-water to 80 fath., C. Round, smooth.
18. L. SPINIFERA, _Mont._ (_Venus._)--_Myrtea s._, _L.
hiatelloides_.--Dartmouth, Plymouth, Hebrides, etc., 8 to 100 fath., M. R.
Oval; dorsal margin spinose.
DIPLODONTA, _Mont._
19. T. ROTUNDATA, _Mont._ (_Tellina._)--_T. undata_, _Lucina r._, _D.
dilatata_.--Dorset, Devon, Tenby, Bantry Bay, etc., 7 to 25 fath., R.
CLAUSINA, _Jeffreys._
20. C. FERRUGINOSA, _Forbes_, (_Kellia._)--Skye, Loch Fyne, etc., 30 to 100
fath., C. Concentrically ribbed, minute, oval.
21. C. CROULINENSIS, _Jeffreys._--Croulin Island, Shellands, R.
Suborbicular.
22. C. ABYSSLICOLA, _Jeffreys._--Not ribbed, R.
[Illustration: BRITISH SHELLS. PLATE VI.]
PLATE VI.
MONTACUTA.
Fig.
1. M. FERRUGINOSA, _Mont._ (_Mya._)--_M. oblonga_, _M. glabra_, _Tellimya
elliptica_, _Erycina f._--S. Devon, Scarborough, Tenby, Cape Clear, etc.,
Mr. Wedge-shaped, long.
2. M. BIDENTATA, _Mont._ (_Mya._)--_Erycina_, _Petricola_, and _Tellimya
b._--Newcastle, Weymouth, Dublin, etc. Burrows in dead shells, Mr. Short,
subquadrate.
3. M. SUBSTRIATA, _Mont._ (_Mya._)--_Erycina_ and _Tellimya s._--Devon,
Tenby, Durham, Zetland, Bantry Bay, etc., on spines of _Spatangus_, deep
water, C. Minute, with diverging striæ.
TURTONIA.
4. T. MINUTA, _O. Fabr._ (_Venus._)--_Mya purpurea_, etc.--Scarborough,
Tenby, Cork, Oban, etc., C.
KELLIA.
5. K. SUBORBICULARIS, _Mont._ (_Mya._)--_Bornia inflata_, _Tellina_ and
_Tellimya s._--Anglesea, Portland, Zetland, etc., low-water to 60 fath.,
Mr.
6. K. LACTEA, _Brown_, (_Tellimya._)--Brit. co. generally. More oblong
than _K. sub._
7, 8. K. RUBRA, _Mont._ (_Cardium._)--_Poronia r._, etc.--Numerous
localities; littoral, C.
LEPTON.
9. L. SQUAMOSUM, _Mont._--_Solen_ and _Lutraria s._--Salcombe Bay, Tenby,
Cork, etc., R. Flat, subquadrate.
10. L. NITIDUM, _Turt._ (_Kellia._)--Torbay, Skye, R. Less square and flat
than _L. squamosum_.
11. L. CONVEXUM, _Alder._--Bantry Bay, Rr. Convex, granulated.
12. L. CLARKIÆ, _Clark._--Exmouth, Plymouth, Zetland, Rr. Minute, oval,
smooth.
13. L. SULCATULUM, _Jeffr._--Annals, Feb. 1859. Guernsey, Mc.
Concentrically wrinkled.
GALEOMMA. Adheres to rocks by byssus.
14, 15. G. TURTONI, _Sowb._--Channel Islands, and Exmouth. Oblong, gaping.
CYCLAS. Inhabits fresh-water.
16. C. CORNEA, _Linn._ (_Tellina._)--_Sphærium c._, Scopoli, _C. rivalis_,
etc.--Ponds and ditches everywhere. Equilateral, subquadrate.
17. C. PISIDIOIDES, _Gray._--_C. cornea_, var., Brit. Moll.--Ditches and
ponds, C. Oblique, and light coloured.
18. C. RIVICOLA, _Leach._--_Cardium nux_, etc.--Thames, etc. Large, oval,
wrinkled.
19. C. CALICULATA, _Drap._-_C. lacustris_, etc.--Newcastle, Bristol, etc.,
Mr. With a ridge at the apex.
20. C. LACUSTRIS, _Drap._--_pallida_, Gray.--Regent's Park, etc., Mr. Oval,
light.
PISIDIUM. Inhabits fresh-water.
21. P. OBTUSALE, _Pfeiffer._--_P. pusillum_, var.?
22. P. PUSILLUM, _Turton_, (_Tellina._)--_Cyclas fontinalis_ and
_gibba_.--In marshes and ponds at various places, C. Includes _P.
obtustale_?
23. P. AMNICUM, _Müller_, (_Tellina._)--_T. rivalis_, _Cyclas palustris_,
_C. obliqua_.--British rivers, etc., generally. _C. obliqua_ ribbed.
24. P. NITIDUM, _Jennyns._--Battersea, Swansea, etc., C. Thick, dark,
blunt.
25. P. HENSLOWIANUM, _Sheppard_, (_Tellina._)--_Cyclas appendiculata_, _P.
acutum_.--Cambridge, Swansea, etc., R. With a projection on the umbones.
26. P. PULCHELLUM, _Jennyns._--_Cyclas fontinalis_, etc.--Various
localities, C. Ridged.
27. P. CINEREUM, _Alder._--_Cyclas c._--Various localities, Mc. Smooth.
28. P. ROSEUM, _Scholtz._--Various loc., with _P. pulchellum_ and _P.
nitidum_ M. C. Subquadrate; animal pink.
[Illustration: BRITISH SHELLS. PLATE VII.]
PLATE VII.
UNIO. Fresh-water Mussel with hinge-teeth.
Fig.
1. U. MARGARITIFERUS, _Linn._ (_Mya._)--_Alasmodon m._, _A. arcuata_, _U.
elongata_, _U. sinuata_.--R. Conway; rivers in Cumberland, Wales, Ireland,
etc., Mc. Long, thick, arched.
2. U. PICTORUM, _Linn._ (_Mya._)--_U. ovalis_, _U. rostrata_, _U.
limosus_, _U. Deshayesii_, etc.--Various British rivers, C. Long, oval, not
wedge-shaped behind.
3. U. TUMIDUS, _Retz._--_Mya_ and _Unio ovalis_, _M. depressa_, _M.
ovata_, _Myscei o._, _M. solida_.--Thames, and various British rivers, C.
More solid, deep, and wedge-shaped than _U. pictorum_.
ANODONTA. Fresh-water Mussel, without teeth.
4. A. CYGNEA, _Linn._ (_Mytilus._)--_M. anatinus_, _M. stagnalis_, _M.
paludosa_, _Symphonota cy._--Britain and Europe generally, in rivers and
canals, C.
DREISSINA, _Beneden._
5. D. POLYMORPHA, _Pallas_, (_Mytilus._)--London Docks, Edinburgh Canal,
C.
MODIOLA, _Lamarck._
6. M. MODIOLUS, _Linn._ (_Mytilus._)--_M. umbilicatus_, _M. curtus_, _M.
vulgaris_.--British coasts generally, C. Large, brown, not rayed.
7. M. OVALIS?, _Sowb._--_M. tulipa_ (_radiata_), var., Brit. Moll., now
named provisionally. Less tumid, and with longer and more gradually sloped
dorsal line than _M. radiata_, Rr.
8. M. RADIATA, _Hanley_, _Brit. Marine Conch._--_M. tulipa_, Brit. Moll.,
Mc. Tumid, radiated.
9. M. BARBATA, _Linn._ (_Mytilus._)--_M. Gibbsii._--Jersey, Torbay,
Milford Haven, Youghal, R. as Brit. Barbs of epidermis serrated.
10. M. PHASEOLINA, _Philippi._--Guernsey, Falmouth, Scotland, Mc. Small
barbs of epidermis not serrated.
11. M. CUPREA, _Jeffreys_, _Ann. Nat. Hist. Jan. 1859_.--In the stomach of
a bird shot at Scarborough, Rr. Minute, rhomboidal, smooth.
CRENELLA, _Brown._
12. C. NIGRA, _Gray_, (_Modiola._)--_Mytilus_ and _Modiola discrepans_,
_depressa_, _compressa_, _discors_.--Scotland, R. Broad and compressed
behind.
13. C. DISCORS, _Linn._ (_Mytilus._)--_Modiola d._ and _discrepans_.--Brit.
co. generally, among seaweeds, C. Wedge-shaped and lobed.
14. C. MARMORATA, _Forbes._--_Mytilus_ and _Mediola discors_, _discrepans_,
and _tumida_.--Brit. co. generally, Cc. Rhomboidal, marbled.
15. C. COSTULATA, _Risso._--Exmouth, Cornwall, Swansea, Herm. Wedge-shaped,
marbled, strongly-ribbed.
16. C. RHOMBEA, _Berkley_, (_Modiola._)--_M. Prideauxiana._--Guernsey,
Torbay, Penzance, etc.; coralline, R.
17. C. DECUSSATA, _Montagu_, (_Mytilus._)--_C._ and _Modiola elliptica_,
_cicercula_, and _faba_.--Scarborough, and a few northern localities, 5 to
50 fath., Mc.; Norway, etc. Subquadrate, decussated, minute.
MYTILUS, _Linn._
18. M. EDULIS, _Linn._--_M. vulgaris._--Brit. co. generally, Cc. Byssal
margin swelled.
19. M. UNGULATUS, _Linn. Syst. Nat._--_M. edulis_, var. _M. incurvatus_
(Hoof-Mussel).--Cornwall, Guernsey, etc., Mr. Byssal margin bent inwards,
lower margin broad and straight.
20, 21. M. GALLOPROVINCIALIS, _Lamk._--_M. edulis_, var. _M. dilatatus_?,
_M. pellucidus_? (young, f. 21), _M. subsaxatilis_?--British Channel, etc.,
C. Dorsal margin dilated, beak advancing.
[Illustration: BRITISH SHELLS. PLATE VIII.]
PLATE VIII.
NUCULA, _Linn._
Fig.
1. N. NUCLEUS, _Linn._ (_Arca._)--_N. margaritacea_, _Glycimeris
argentea_.--Brit. co. generally, 7 to 90 fath., C. Thick, obtuse; beaks
terminal.
2. N. DECUSSATA, _Sowerby._--_N. sulcata_, _N. Polii_.--Hebrides, Loch
Fyne, Dublin Bay, 30 to 50 fath., Mr. Large, striated; beak not terminal.
3. N. RADIATA, _Hanley._--_N._ and _Arca nucleus_ and _radiata_.--Torbay,
Milford Haven, Arran, etc., 10 to 70 fath., Mc. Prolonged anteriorly,
rayed.
4. N. NITIDA, _Sowerby._--_N. nucleus_, var.--Numerous British loc., 1 to
35 fath., C. Shining, ends rather pointed.
5. N. TENUIS, _Montagu_, (_Arca._)--North British co., 40 to 100 fath.,
sand, C. Thin, inner edge not crenated; beak terminal.
LEDA, _Schum._ Beaked behind.
6. L. CAUDATA, _Donovan_, (_Arca._)--_Arca_ and _Nucula minuta_ and
_rostrata_.--North co., C.; south co., R. 10 fath. to deep water. Ridged.
7. L. PYGMÆA, _Munster_, (_Nucula._)--_N._ and _L. tenuis_, _gibbosa_, and
_lenticula_.--Skye, Hebrides, Croulin Isl., 25 to 50 fath. Minute, smooth.
Size (omitted) one-fifth of an inch.
ARCA, _Linnæus._
8, 9. A. LACTEA, _Linn._--_A. barbata_, _A. Modiolus_, _A. crinita_, _A.
perforans_, _A. Gaimardii_, var. f. 8; _A. Quoyi_, var. f. 9.--Penzance,
Ilfracombe, Bantry Bay, Guernsey, etc. Adhering to shells and stones, 15 to
20 fath., C. Beaks approaching, radiately striated.
10. A. TETRAGONA, _Poli._--_A. Noæ_ and _imbricata_.--Many Brit, loc., C.
(12 to 50 fath.). Broad area between beaks.
11. A. RARIDENTATA, _S. Wood._--_A. pectunculoides._--Skye, Hebrides, etc.,
Scot. Cape Clear, 40 to 60 fath., Mr. Minute, teeth few.
12. A. NODULOSA, _Ph._--E. Zetland, Shetland Isls., Rr.
PECTUNCULUS.
13. P. GLYCIMERIS, _Linn._ (_Arca._)--_A._ and _P._ and _Glycimeris
pilosa_, _orbicularis_, _undata_, and _marmorata_.--Brit. co. generally, 15
to 60 fath., C.
LIMOPSIS.
14. L. PELLUCIDA, _Jeffreys_, _Ann. Nat. Hist. Jan. 59_.--Dredged in sand
at Guernsey, Rr.
AVICULA.
15. A. TARENTINA, _Lamk._--_Mytilus_ and _Avicula hirundo_, etc.--Bantry
Bay, Devon, etc., R.
PINNA.
16. P. PECTINATA, _Linn._--_P. fragilis_, _muricata_, _ingens_, _lævis_,
_papyracea_, _rotundata_, _elegans_.--Dorset, Milford Haven, Hebrides, Cape
Clear; deep water, Mc.
OSTREA.
17. O. EDULIS, _Linn._--_O. vulgare_, etc.--Various natural and artificial
beds, in England, Scotland, and Ireland. The common Oyster.
ANOMIA.
18. A. EPHIPPIUM, _Linn._--_A. electrica_, _A. squamula_, _cepa_,
etc.--Brit. co. generally, 1 to 30 fath., C. Pearly and irregular; beak
marginal, curved.
19. A. ACULEATA, _Müller._--_A. striolata._--Brit. co. generally, Mc.
Small, with spinous sculpture.
20. A. STRIATA, _Lovén._--Hebrides, R. Rayed, striated, with apex not
marginal.
21. A. PATELLIFORMIS, _Linn._--_A. undulata._--Cape Clear, etc., 1 to 50
fath., Mr. Flat, ribbed.
LIMA.
22. L. SUBAURICULATA, _Montagu_, (_Pecten._)--_L. nivea_, _sulcata_,
etc.--Plymouth, Man, Zetland, Belfast, etc., Mr. Nearly straight.
23. L. HIANS, _Gmel._ (_Vitræa._)--_L. tenera_, _fragilis_, _aperta_,
etc.--Channel Isls., Penzance, Oban, Belfast, etc., Mc. Oblique, gaping at
sides.
24. L. LOSCOMBII, _Sowerby._--_Pecten_ and _Ostrea_ and _Lima fragilis_ and
_bullata_.--Many Brit. loc., 10 to 50 fath., Mc. Oblique, closed at sides.
[Illustration: BRITISH SHELLS. PLATE IX.]
PLATE IX.
PECTEN. Free, except 1.
Fig.