B.M.--Specimens in the British Museum (Natural History)._The British Woodlice Being a Monograph of the Terrestrial Isopod Crustacea Occurring in the British Islands

J.T.C.--John Thomas Carrington.

J.A.M.--James A. Murie.

R.M.--Roland Matthams.

R.F.S.--R. F. Scharff.

C.S.--Charles Sillem.

T.R.R.S.--The Rev. Thomas R. R. Stebbing.

W.M.W.--Wilfred Mark Webb.

R.W.--R. Welch.

(1) BATE, C. SPENCE, and WESTWOOD, J.C.: _A history of the British

Sessile-eyed Crustacea_, London, 1868.

(2) BOSC, L. A. G.: _Manuel de l'histoire Naturelle des

Crustacés_, Vol. II. Paris, 1830.

(3) BRANDT, J. F.: "Conspectus Monographiae Crustaceorum

Oniscodorum Latreillei," _Bull. Soc. Nat., Moscow._ Vol. VI.

(1833), pp. 171-193.

(4) BRANDT, J. F., and RATZEBURG, J. T. C.: _Medizinische

Zoologie._ Vol. II., Berlin, 1830-1834.

(5) BRUNTZ, L.: "Contribution à l'Etude de l'Excretion chez les

Arthropodes." _Archives de Biologie._ Vol. XXII. (Nov., 1903),

pp. 215-422, pls. I.-VIII.

(6) BUDDE-LUND, G.: "Danmarks Isopode Landkrebsdyr,"

_Naturhistorisk Tidsskrift._ Part 3, vol. VII. (1870,

pp. 217-245).

(7) BUDDE-LUND, G.: _Prospectus generum specierumque Crustaceorum

Isopodum terrestrium._ Copenhagen, 1879.

(8) BUDDE-LUND, G.: _Crustacea Isopoda Terrestria._ Hauniae, 1885.

(9) CUVIER, G.: "Memoires sur les Cloportes terrestres." _Journ.

d'hist. nat._ Vol. II. 1792.

(10) DE GEER, C.: _Memoires pour servir à l'histoire des

insectes._ Vol. VII., Stockholm, 1778.

(11) DESMAREST, A.G.: _Considérations générales sur la classe des

Crustacés._ Paris, 1825.

(12) DOLLFUS, A.: "Catalogue raisonné des Isopodes terrestres de

l'Espagne." _Ann. Soc. Espan. Hist. Nat._ Vol. XXI. (1892),

pp. 161-190.

(13) DOLLFUS, A.: "Sur la Distribution Geographique des Isopodes

terrestres dans la region des Basses-Pyrenees." _Assoc.

Francaise pour l'avancement des Sciences. Rep. Congress de

Pau._, 1892.

(14) DOLLFUS, A.: "Le Genre Armadillidium." _Feu. des Jeunes

Naturalistes_, Ser. 3. May 1892.

(15) DOLLFUS, A.: "Catalogue raisonné des Isopodes terrestres de

l'Espagne." Premier supplement, _Ann. Soc. Espan. Hist. Nat._

Vol. XXII. (1893), pp. 47-51.

(16) DOLLFUS, A.: "Isopodes Terrestres in 'Voyage de M. Ch.

Allmand aux Iles Canaries.'" _Mem. Soc. Zool. de France._

Vol. VI. (1893), p. 46.

(17) DOLLFUS, A.: "Sur la Distribution Geographique des

Armadilliens en Europe." _Compte-Rendu troisieme Congres.

Internal. de Zool._ Leyden, Sept. 1895 (1896), pp. 356-358.

(18) DOLLFUS, A.: "Les Isopodes terrestres du Nord de l'Afrique du

Cap. Blanc a Tripoli." _Mem. Soc. Zool. Trans._ Vol. IX.

(1896), pp. 523-553.

(19) DOLLFUS, A.: _Crustacés Isopodes de la Sicile._ 1896.

(20) DOLLFUS, A.: "On West Indian Isopod Crustaceans." _Proc.

Zool. Soc. Lond._ 1896, pp. 388-400.

(21) DOLLFUS, A.: "Tableau Iconographique des _Philoscia_

d'Europe." _Feu. des Jeun. Natural._ Ser. 3, 1897, pp. 70-73

and 91-95.

(22) DOLLFUS, A.: "Land Isopods der Balkan region." _Wissenschaft

Mittheilung aus Bosnien und der Hercegovina._ Vol. IV. (1896).

(23) DOLLFUS, A.: "Les Crustacés Isopodes Terrestres à grande

dispersion," _Feu des Jeun. Natural._ Ser. 3 (Oct. 1897).

(24) DOLLFUS, A.: "Sur la Distribution Geographique des Isopodes

Terrestres dans l'Afrique Septentrional du Senegal à Obock."

_Proc. Inter. Congres. Zool._ Cambridge, 1898, pp. 249-259.

(25) DOLLFUS, A.: "Catalogue des Crustacés Isopodes Terrestres de

France." _Feu. des Jeun. Natural._ Ser. 3 (October 1899).

(26) FABRICIUS, J.C.: _Entomologia systematica._ Vol. II.,

Hauniae, 1793.

(27) FABRICIUS, J. C.: Supplement to the last, 1798.

(28) FERNIE, Dr.: _Animal Simples_, 1899.

(29) FITCH, Asa.: _Noxious Insects of New York._ Albany, 1856.

(30) GUERIN, F.E.: "Sur _Porcellio Poeyi_." _Ann. Sci. Soc. Entom.

de France._ Vol. VI. (Paris, 1837, in Bull. ent., page 6).

(31) HELLER, C.: _Reise der Novara; Crustacea._ 1865.

(32) KINAHAN, J.R.: "Analysis of certain genera of terrestrial

Isopoda." _Nat. Hist. Rev._ Vol. IV. (1857).

(33) KINAHAN, J.R.: "On the genera _Philoscia_, _Itea_ and

_Philougria_." _Nat. Hist. Rev._ Vol. V. 1858.

(34) KOCH, C.L.: _Deutschlands Crustaceen, Myriapoden and

Arachniden._ Regensburg, 1835-1844.

Koch's descriptions and figures were published in _Deutschlands

Crustaceen_ and appeared also in Panzer's _Faunæ Insectorum

Germanicæ_ continued by Herrich-Schäffer (which see). The

number of the parts of the latter which correspond to those

of the former are placed in square brackets after them in the

list here given. Part 6 (1836) [139]; Part 22 (1838) [162];

Part 28 (1839) [178]; Part 34 (1840) [180]; Part 36 (1844)

[186]. Some of the dates quoted will be found to differ from

those usually given (in Budde-Lund (8, p. 7) for instance),

and printed on the parts of the copy in the Zoological

Society's Library. Our authority for this change is Mr. C. D.

Sherborne, who bases his dates upon reviews which he has

discovered.

(35) KOCH, C. L.: _System der Myriapoden mit den Verzeichnissen

und Berichtigungen zu Deutschlands Crustaceen, Myriapoden und

Arachniden._ Regensburg, 1847.

(36) LAMARCK, J. B.: _Histoire naturelle des animaux sans

vertébres._ Vol. V., 1818.

(37) LATREILLE, P. A.: _Histoire Naturelle des Crustacés et des

Insectes._ Vol. VII., Paris, 1804.

(38) LEACH, W. E.: "Tabular view of the external characters of

four classes of animals, which Linné arranged under Insectes."

_Trans. Linn. Soc. Lond._ Vol. XI., 1815.

(39) LEREBOULLET, A.: "Memoire sur les Crustacés de la famille des

Cloportides qui habitent les environs de Strasbourg." _Mem. Soc.

Mus. Hist. Nat. Strasbourg._ Vol. IV., 1853, pp. 130, pl. X.

(40) LEUCKART, R.: _Verzeichnisz der zur Fauna Helgolands

gehörenden wirbellosen Seethiere._ Braunsweig, 1847.

(41) LINNÉ, C.: _Fauna Suecica._ First edition, Holmiæ, 1746.

(42) LINNÉ, C.: _Fauna Suecica._ Second edition, Holmiæ, 1761.

(43) LINNÉ, C.: _Systema Naturae_, ed. 12, 1767.

(44) MIERS, E. J.: "Catalogue of New Zealand Crustacea." _Ann.

Mag. Nat. Hist., Ser. 4._, Vol. XVII., 1876.

(45) MIERS, E. J.: "On a collection of Crustacea (Decapoda and

Isopoda), chiefly from South America." _Proc. Zool. Soc._,

1877, p. 653-678.

(46) MILNE-EDWARDS, H.: _Histoire naturelle des Crustacés._ Vol.

III. Paris, 1840.

(47) NICHOLSON and LYDDEKER: _Manual of Palæontology_, 1889, Vol.

II., p. 559.

(48) NORMAN, A. M.: "Note on the discovery of _Ligidium agile_,

Persoon (_Zia saundersii_ Stebbing)." _Ann. Mag. Nat. Hist.

Ser. 4_, Vol. XI., p. 419.

(49) NORMAN, A. M.: "British Land Isopoda." _Ann. Mag. Nat. Hist.

(Ser. 7)_, Vol. III. (1899), pp. 71-78, pl. VI.

(50) NORMAN, A. M.: Continuation of the last. Vol. XI., 1903, pp.

309-372.

(50a) NORMAN, A.M.: and BRADY C.S.: "British Land Isopoda." Second

Supplement _Ann. Mag. Nat. Hist. (Ser. 7)_, Vol. XIV. (1904),

pp. 449-450.

(51) PANZER, G. W. F.: _Faunæ Insectorum Germanicæ initia, oder

Deutschlands Insecten._ Parts 1-110, Nurnberg, 1793-1813.

(See Koch.)

(52) PANZER, G. W. F.: Continuation by Herrich-Schäffer, Parts

111-190, 1829-1844. (See Koch.)

(53) PARFITT, E.: "The Fauna of Devon." Sessile-Eyed Crustacea.

_Trans. Devon Assoc. Sci._, Sept. 1873.

(54) PERSOON: No paper upon Woodlice by this author is known, but

he is quoted in Panzer's _Deutschlands Insecten_ (51), which

see.

(55) PLATEAU, F.: "Crustacés Isopodes Terrestres." _Bull. Acad.

Roy. de Belgique, Ser. 2._, Vol. XXIX., No. 2 (1870), p. 112.

(56) RISSO, A.: _Histoire Naturelle des Crustacés des environs de

Nice._ Paris, 1816.

(57) ROBERTSON, D.: "Catalogue of the Amphipoda and Isopoda of

the Firth of Clyde." _Trans. Nat. Hist. Soc. Glasgow_, Vol. II.

(1888), pp. 9-99.

(58) ROULE, LOUIS: "Etudes sur le Development de Crustacés." _Ann.

Sci. Nat._, Vol. XVIII. (1895), pp. 1-156, pls. I.-X.

(59) SARS, G. O.: _An account of the Crustacea of Norway._ Vol.

II., 1896-1899.

(60) SAUSSURE, H. de: "Diagnoses de quelques crustacés nouveaux

des Antilles et du Mexique." _Rev. et Mag. de Zool. (Ser. 2)_,

Vol. IX. (1857), pp. 304-308.

(61) SAVIGNY, J. C., and AUDOUIN, V.: _Description de l'Egypte._

Vol. XXII., 1827.

(62) SAY, T.: "An account of the Crustacea of the United States."

_J. Acad. Nat. Sci. Philadelphia_, Vol. I., pt. II., 1818.

(63) SCHARFF, R. F.: "The Irish Woodlice." _Irish Naturalist_,

Vol. III., 1894, pp. 4-7 and 25-29, pl. II.

(64) SCHARFF, R. F.: "The Woodlice of Co. Carlow." _Irish

Naturalist_, 1895, p. 319.

(65) SCHNITZLER, H. J.: _De Oniscineis agri Bonnensis._ (Thesis.),

Cologne, 1853.

(66) SCHOBL, J.: "_Typhloniscus_, eine neue blinde Gattung der

Crustacea Isopoda." _Sitzungsberichte der math. naturw. Acad.

Wiss. Wien._ Vol. XL. (1860), pp. 279-330.

(67) SCOPOLI, J. A.: _Entomologia Carniolica._ Vindibonæ, 1763.

(68) SCOTT, T.: "The Land and Freshwater Crustacea of the District

around Edinburgh." _Proc. R. Phys. S. Edin._, Vol. XI.

(1890-91), p. 75.

(68a) SCOTT, T.: _British Association Hand Book on the Natural

History of Glasgow._ 1901; _Isopoda_, pp. 335 and 336.

(69) SILL, VICTOR: "Beitrag zur Kentniss der Crustaceen,

Arachniden and Myriapoden Siebenburgens." _Verhandl. u.

Mittheil. des Siebenburghischen Ver. für Naturwiss. zu

Hermannstadt_, Vol. XII. (1861), p. 1-11.

(70) STEBBING, T. R. R.: "On a Crustacean of the Genus Zia." _Ann.

Mag. Nat. Hist. Ser. 4._, Vol. XI. (1873).

(71) STEBBING, T. R. R.: _The Victoria County History of Essex_

(1903); Crustacea, pp. 27-28.

(71a) STEBBING, T. R. R.: _The Victoria County History of

Buckinghamshire_ (1905); Crustacea.

(72) VEJDOVSKYF: "Zur Morphologie der Antennen und Schalendruse

der Crustaceen." _Zeit. Wiss. Zool._, Vol. LXIX., p. 378.

(73) VERHOEF, K. W.: "Ueber Palæarktische Isopoden." _Zool. Anz._,

Vol. XXIV.

(74) WEBB, WILFRED MARK: "The occurrence in Essex of a species

of Woodlouse (Isopoda) new to Britain (_Porcellio ratzeburgii_,

Brandt)." _Essex Naturalist_, Vol. XI. (1899), p. 127.

(75) WEBB, WILFRED MARK: "Notes on Woodlice" (Including extracts

from a paper read before the North London Natural History

Society by James B. Casserley). _Science Gossip_, Vol. VI.,

New Series (1900), pp. 295-296.

(76) WEBER, MAX.: "Uber einige neue Isopoden der Niederlandischen

Fauna." _Tijdschr der Niederland Dierk veren_, Vol. V. (1881),

pp. 167-196, pl. V.

(77) ZADDACH, E. G.: _Synopses crustaceorum Prussicorum prodromus

Regiomonti_, 1844.

(78) ZENKER, C. D.: No paper upon woodlice by this author is

known, but he is quoted in Panzer's _Deutschlands Insecten_

(51), which see.

(79) ZITTEL, K. A. von: _Textbook of Palæontology_. English

Translation 1900, p. 668.

INDEX.

Abdomen, 2, =2=

Aegidae, 2

Air cavities, in abdominal appendages, 31

Air tubes, 1, 6, 31, 33, 34, 35, 36, 37, 39

_albidus, Trichoniscoides_, description of, 25

Alcohol, 16

Antennae, large, 2, =3=

" smaller, 2, =3=

Alimentary canal, 6, =7=

Ants, 31

" wood, 14

Anus, 31, inset facing =10=

Appendages, 2

" abdominal, 5, =6=

_Archaeoniscus brodiei_, 2

Armadillidæ, 17

" characters of, 18, 40

_Armadillidium_, 15, 38

" _commutatum_, 41

" _depressum_, 44

" " description of, 43

" " flagellum of, =43=

_Armadillidium nasatum_, 41, 44, Plate xxii.

" " description of, 40

" " flagellum of, =40=

_Armadillidium pictum_, 42

" _pulchellum_, 43, 44, 45, Plate xxxiv.

" " description of, 42

" " flagellum of, =42=

_Armadillidium vulgare_, 15, 40, 43, 44, Plate xxiii.

" " description of, 41

" " flagellum of, =41=

" " moulting of, 12, 13

" _zenckeri_, 41

_Armadillo ater_, 41

" _maculatus_, 41, 42

" _pillularis_, 41

" _pustulosus_, 41

" _trivialis_, 41

" _variegatus_, 41

" _vulgaris_, 41

Arthropoda, 1

Arteries, 7, =7=

_asellus, Oniscus_, description of, 27

Avebury, Lord, 31

Baden, Miocene of, 2

Bate and Westwood, 17, 19, 30

Blastoderm, 10

Body cavity, 11, inset facing =10=

Brady, Professor C. S., 45

Branchial nephrocytes, 8

British Association, 19

Brood pouch, 4, =5=, 9

Budde-Lund, 28

Calman, Dr., 45

Carpenter, 15

Cells, nucleated, 10, inset facing =10=

Cephalic nephrocytes, 8

Cheslip, 15

Chiselbob, 15

Church louse, 16

Cicatricula, 10, inset facing =10=

_cingendus, Metoponorthus_, description of, 38

Circulatory system, 6, 7

Classification, 17

Coal measures, 1

Collection of Woodlice, methods of, 16

Commissures, 8, =8=

Conclusion, 43

_convexus, Cylisticus_, description of,39

_couchii, Philoscia_, description of, 30

Crabs, land, 1

Crustacea, 1

Cud worm, 15, 16

_Cylisticus_, 40

" characters of, 17, 18, 38

_Cylisticus convexus_, 44, Plate xxi.

" " description of, 39

" " flagellum of, =39=

" _laevis_, 35, 39

_Cymothoa oceanica_, 20

_danicus, Haplophthalmus_, description of, 27

_depressum, Armadillidium_, description of, 43

Development, 9

Digestive glands, 6, =7=

_dilatatus, Porcellio_, description of, 33

Distribution of species, 43

Dollfus, Adrian, 45

Economic considerations, 12

Egg, 9, 10, =10=, =11=, inset facing =10=

" segmentation of, 11, inset facing =10=

Embryo, 10, =11=

Endoderm, 10, inset facing =10=

Essex, Woodlice recorded from, 44

Excretory organs, 7

Exhibition of species new to Britain, 45

Exmoor, woodlice and ants on, 14

External structure, 2

Flagellum, 3, =3=

Food, 13, 14

Ganglia, cerebral 8

Geological history, 1

Genera, 17

Gill, 5, =5=

Gills, 7, =6=

_Glomeris marginata_, 15

Grammar sows, 16

Growth, time required for, 12

Gullet, 6

Gut, fore, inset facing =10=

" mid, inset facing =10=

Habits, 12

Hall, Miss Kate M., 31

_Haplophthalmus_, 22

" characters of, 17, 18, 26

" _danicus_, 44, Plate viii.

" " description of, 27

" " flagellum of, =27=

" _elegans_, 26

" _mengii_, 44, 45, Plate vii.

" " description of, 26

" " flagellum of, =26=

Head, 2, =2=, =3=

Heart, 6, 7, =7=, 11

Herefordshire, Old Red Sandstone, 1

History, geological, 1

_hoffmannseggii, Platyarthrus_, description of, 30

Hog-louse, 15

Hogs, little grey, 16

Hydro-cyanic acid gas for destroying woodlice, 14

_hypnorum, Ligidium_, description of, 21

Insects, 1

Intestine, 6, =7=

" formation of, in embryo, 10, 11

Isle of Wight, Oligocene of, 2, Oolite of, 2

Isopoda, 1, 19

_Itea crassicornis_, 30

" _laevis_, 22

" _mengii_, 26

" _rosea_, 24

" _riparia_, 22

" _vivida_, 23

Jurassic, Upper, 2

Kinahan, Professor, 19, 28, 30

Kitchenball, 15

Labels, 16

_laevis, Porcellio_, description of, 35

_Ligia_, 21

" branchial nephrocytes, 8

" characters of, 17, 18, 19, 20

" _hypnorum_, 21

" _melanocephala_, 29

" _oceanica_, 44, Plate i.

" " description of, 20

" " excretory organs of, 7, 8

" " flagellum of, 20, =20=

" _scopulorum_, 20

Ligiae, 17

" characters of, 19

Ligiidae, characters of, 17, 18, 19

_Ligidium_, 19

" characters of, 17, 18, 21

" _hypnorum_, 44, Plate ii.

" " description of, 21

" " excretory organs of, 7

" " in Surrey, 19

" _persoonii_, 21

Lip, the lower, 4, =5=

" the upper, 4, =5=

Lucre pig, 15

Lugdor, 15

Mandibles, 3, =4=

Manure, from stables, favourable to woodlice, 14

Maxillae, first, 3, =4=

" second, 3, =4=

" openings of excretory organs on second, 7

Maxillipeds, 3, =4=

_mengii, Haplophthalmus_, description of, 26

Mesoderm, 10, inset facing =10=

Methylated spirit, 16

_Metoponorthus_, 21

" characters of, 18, 37

" _cingendus_, description of, 38, Plate xx.

" " flagellum of, =38=

" _pruinosus_, 44, Plate xix.

" " description of, =37=

" " flagellum of, 37

" _simplex_, 38

Miocene, 2

Middlesex, West, 35

Millipede, pill, 15, 40

Moult, 11

Moulting, process of, 12, 13, 14

Mouth appendages, 3, =4=

_muscorum, Philoscia_, description of, 29

Names, local, 15

_nasatum, Armadillidium_, description of, 40

Nephrocytes, branchial, 8

" cephalic, 8

Nerve cord, 8, =8=

Nervous system, 8

Norman, Rev. Canon A. M., 25, 27, 45

_oceanica, Ligia_, description of, 20

Oenigen, Miocene of, 2

Old-sows, 16

Old women of the wood, little, 16

Oligocene, 2

Onisci, 17

" characters of, 27

Oniscidae, 19

_Oniscus_, 28

" branchial nephrocytes, 8

" characters of, 17, 18, 27

" _agilis_, 21

" _asellus_, 4, 15, 28, 44, Plate ix.

_Oniscus asellus_, Albino in Epping Forest, 28

" " description of, 27

" " excretory organs of, 8

" " flagellum of, =28=

" " young examples of, 28

" _convexus_, 39

" _fossor_, 19, 28

" _granulatus_, 32

" _murarius_, 27

" _muscorum_, 29

" _oceanicus_, 20

" _pulchellum_, 42

" _sylvestris_, 29

Oolite, 2

Ovaries, 8, =8=

Oviducts, 8, =8=

Palmer, 16

Penis, 9, =9=

Peduncle, 3, =3=

_Philoscia_, 21, 28

" characters of, 17, 18, 29

" _couchii_, 44, Plate xi.

" " description of, 30

" " flagellum of, =30=

" _marmorata_, 29

" _muscorum_, 21, 44, Plate x.

" " description of, 20

" " flagellum of, =29=

_Philougria celer_, 29

" _riparia_, 22

" _rosea_, 24

" _vivida_, 23

Physicians, college of, rules for preparing woodlice for

medicinal use, 18

_pictus, Porcellio_, description of, 33

Pill millipede, 15, 40

_Platyarthrus_, 22

" characters of, 17, 18, 39

" _hoffmannseggii_, 44, Plate xii.

" " description of, 30

" " flagellum of, =31=

_Porcellio_, 6, 28, 38

" characters of, 7, 18, 32

" _armadilloides_, 39

" _asper_, 32

" _aztecus_, 35

" _brandtii_, 32

" _cinerascens_, 35

" _cingendus_, 38

" _cotillae_, 35

" _cubensis_, 35

" _degeerii_, 35

" _dilatatus_, 34, 44, Plate xv.

" " description of, 33

" " flagellum of, =34=

" _dubius_, 32, 33

" _ferrugineus_, 34

" _flavipes_, 35

" _flavo-vittatus_, 37

" _frontalis_, 37

" _graniger_, 32

" _laevis_, 39, 44, Plate xvii.

" " description of, 35

" " flagellum of, =35=

" _lugubris_, 36

" _maculicornis_, 37

" _melanocephalus_, 33

" _mexicanus_, 35

" _mixtus_, 33

" _montezumae_, 32

" _musculus_, 35

" _nemorensis_, 36

" _nigra_, 32

" _paulensis_, 32

" _pictus_, 34, 44, Plate xiv.

" description of, 33

" flagellum of, =33=

" _poeyi_, 35

" _pruinosus_, 37

" _quercum_, 36

" _rathkei_, 35, 36, 44, 45

" " description of, 34, Plate xvi.

" " flagellum of, =35=

" _ratzeburgii_, 44, Plate xviii.

" " description of, 36

" " flagellum of, =36=

" _scaber_, 28, 44, Plate xiii.

" " description of, 32

" _scaber_, development of, 9

" " flagellum of, 32

" " Milne Edwards, 33

" _spinifrons_, 39

" _striatus_, 34

" _sumichtasti_, 35

" _syriacus_, 35

" _tetramoerus_, 34

" _trilineatus_, 34

" _trivittatus_, 34

" _truncatus_, 37

" _urbicus_, 35

_Porcellionides_, Miers, 37

Preservation of Woodlice, methods of, 16

Pro-ectoderm, 10, inset facing =10=

Pro-endoderm, 10, inset facing =10=

Protoplasm, formative, 10

_pruinosus, Metoponorthus_, description of, 37

pseudotracheae, 31

_pulchellum, Armadillidium_, description of, 42

_pusillus, Trichoniscus_, description of, 22

Purbeck Beds, 2

Quay-louse, 20

Quay lowders, 20

_rathkei, Porcellio_, description of, 34

_ratzeburgii, Porcellio_, description of, 36

Reproductive organs, 8, =8=, =9=

_roseus, Trichoniscus_, description of, 24

Roule, Professor Louis, 9

Sandstone, old red, 1

Sars, Professor G. O., 17, 23

_scaber, Porcellio_, description of, 32

Scharff, Dr. R. F., 17, 19, 23, 45

Seminal reservoir, 9, =9=

Socchetre, 16

Sow bug, 15

Species, distribution of, 43

St. Anthony's hogs, 16

Stebbing, the Rev. T. R. R., 19, 21, 35, 44, 45

Swanley Horticultural College, 14

Tertiary deposits, 2

Testes, 9, =9=

Thorax, 2, 3

Thrush louse, 15

Tiggyhog, 15

Tracheae, 6, 31

Trichoniscidæ, characters of, 18, 22

_Trichoniscoides_, 21, 22, 26

" characters of, 17, 18, 25

" _albidus_, 44, 45

" " description of, 25

" " flagellum of, =25=

_Trichoniscus_, 21, 22, 26

" characters of, 17, 18, 22

" _pusillus_, 22, 23, 24, 25, 44, Plate iii.

" " description of, 22

" " flagellum of, =23=

" _pygmaeus_, description of, 23

" _roseus_, 23, 25, 44, Plate v.

" " description of, 24

" " flagellum of, =24=

" _vividus_, 22, 25, 44, Plate iv.

" " description of, 23

" " flagellum of, =24=

Tubes for specimens, 16

_Typhloniscus steinii_, 30

_vividus, Trichoniscus_, description of, 23

_vulgare, Armadillidium_, description of, 41

Walking legs, 4, 5

Webb, Mr. Wilfred Mark, 20, 25, 26, 35, 36, 45

Welsh names for Woodlice, 16

Westwood, Bate and, 17, 19, 30

White arsenic for destroying Woodlice, 14

Willmott, Miss, 45

Wood-ants, 15

Woodlice, in captivity, 12

" methods for getting rid of, 24

" position of, 1

" storage of specimens, 16

" Welsh names for, 16

Woodlouse, common, 4

Yolk, food, 10, 11, inset facing =10=

_Zia agilis_, 21

" _melanocephala_, 29

LIST OF PLATES.

PLATE

_Ligia oceanica_ Linné I.

_Ligidium hypnorum_ Cuvier II.

_Trichoniscus pusillus_ Brandt III.

_Trichoniscus vividus_ Koch IV.

_Trichoniscus roseus_ Koch V.

_Trichoniscoides albidus_ Budde-Lund VI.

_Haplophthalmus mengii_ Zaddach VII.

_Haplophthalmus danicus_ Budde-Lund VIII.

_Oniscus asellus_ Linné IX.

_Philoscia muscorum_ Scopoli X.

_Philoscia couchii_ Kinahan XI.

_Platyarthrus hoffmannseggii_ Brandt XII.

_Porcellio scabier_ Latreille XIII.

_Porcellio pictus_ Brandt and Ratzeburg XIV.

_Porcellio dilatatus_ Brandt XV.

_Porcellio rathkei_ Brandt XVI.

_Porcellio laevis_ Latreille XVII.

_Porcellio ratzeburgii_ Brandt XVIII.

_Metoponorthus pruinosus_ Brandt XIX.

_Metoponorthus cingendus_ Kinahan XX.

_Cylisticus convexus_ De Geer XXI.

_Armadillidium nasatum_ Budde-Lund XXII.

_Armadillidium vulgare_ Latreille XXIII.

_Armadillidium pulchellum_ Zencker XXIV.

_Armadillidium depressum_ Brandt XXV.

[Illustration: _PLATE I._

LIGIA OCEANICA Linné. THE QUAY-LOUSE.

_Length, two to three centimetres._