with the triangular plates, ×1000
Fig. 2_b_. Vertical section through the shell-wall, with an
alveole, ×1000
Fig. 3. _Circostephanus coronarius_, n. sp., × 150 1699
The polyhedral shell exhibits in its wall the small
tangential needles. The radial spines are partly broken
off. The mouth of the shell, surrounded by eight short
conical teeth, is visible on the left side of the
figure.
Fig. 3_a_. The mouth of the shell, seen in profile, with
eight conical spinulate teeth, × 400
Fig. 3_b_. The base of a radial spine broken off, to show
the corona of (five or six) basal pores, × 400
[Illustration: 1. 2. POROSPATHIS, 3. CIRCOSTEPHANUS.]
PLATE 117.
LEGION PHÆODARIA.
Orders PHÆOCYSTINA ET PHÆOGROMIA.
Families CANNORRHAPHIDA, MEDUSETTIDA et CIRCOPORIDA.
Fig. 1. _Circogonia icosahedra_, n. sp., × 80 1698
The entire shell, with twelve radial tubes and twenty
triangular faces. In the centre of one face is the
mouth, with six teeth.
Fig. 1_a_. The mouth alone, with its six spinulate teeth, × 400
Fig. 2. _Circorrhegma dodecahedra_, n. sp., × 80 1699
The entire shell, with twenty radial tubes and twelve
pentagonal faces. In the centre of one face is the
mouth, with five teeth.
Fig. 2_a_. The mouth alone, with its five spinulate teeth,
seen in profile, × 200
Fig. 3. _Circospathis novena_, n. sp., × 100 1696
The entire shell, with nine radial tubes and fourteen
triangular faces. In one face (to the left above) is
the mouth with nine teeth.
Fig. 3_a_. The mouth alone, with its nine spinulate teeth, × 150
Fig. 4. _Circoporus hexastylus_, n. sp., × 80 1695
A single radial spine.
Fig. 5. _Circoporus sexfurcus_, n. sp., × 80 1694
The entire spherical shell with six forked and ciliated
radial tubes. In the centre the cruciform mouth with
four teeth.
Fig. 6. _Circoporus octahedrus_, n. sp., × 300 1695
The entire shell, with six verticillate radial tubes and
eight triangular faces. In the centre of one face is
the mouth, with four teeth.
Fig. 7. _Cortinetta tripodiscus_, n. sp., × 300 1667
The entire shell with the enclosed central capsule, and the
phæodium around the astropyle.
Fig. 7_a_. The astropyle, partly detached from the wall of
the central capsule, seen in profile, × 800
Fig. 8. _Catinulus quadrifidus_, n. sp., × 80 1553
A complete specimen, with four equal central capsules,
united in a single spherical calymma.
Fig. 8_a_. Some single pieces of the skeleton, × 400
[Illustration: 1. CIRCOGONIA, 2. CIRCORRHEGMA, 3. CIRCOSPATHIS, 4.-6.
CIRCOPORUS, 7. CORTINETTA, 8. CATINULUS.]
PLATE 118.
LEGION PHÆODARIA.
Order PHÆOGROMIA.
Family MEDUSETTIDA.
Fig. 1. _Gazelletta melusina_, n. sp., × 300 1674
From the peristome of the thorny campanulate shell arise
six large descending feet, which are studded with
arborescent fragile lateral branches, and armed at the
distal end with stouter dichotomous terminal branches.
Fig. 2. _Euphysetta staurocodon_, n. sp., × 300 1670
The peristome of the ovate shell bears an odd large foot
with three terminal branches and three cruciate
rudimentary feet. In the upper part of the shell-cavity
is visible the sphæroidal central capsule (containing a
nucleus of half the size, with numerous nucleoli); in
the lower half the dark pigment-masses of the green
phæodium.
Fig. 3. _Euphysetta amphicodon_, n. sp., × 300 1670
The shell-wall exhibits the regular alveolate structure.
From the mouth are prominent large masses of the
phæodium, which is more voluminous than the
shell-cavity, and seems to contain nucleated cells.
[Illustration: 1. GAZELLETTA, 2. 3. EUPHYSETTA.]
PLATE 119.
LEGION PHÆODARIA.
Order PHÆOGROMIA.
Family MEDUSETTIDA.
Fig. 1. _Gorgonetta mirabilis_, n. sp., × 100 1674
The entire body. From the margin of the cap-shaped shell
arise six ascending arborescent feet and six
alternating descending feet, which are covered with
anchor-pencils and branched at the distal end. From the
mouth of the delicately alveolate shell depend
prominent parts of the dark voluminous phæodium.
Fig. 2. _Gorgonetta mirabilis_, n. sp., × 300 1674
The distal end of an ascending foot; the branches bear a
terminal spathilla with small recurved teeth.
Fig. 3. _Gorgonetta mirabilis_, n. sp., × 300 1674
The distal end of a descending foot, with three lateral
anchor-pencils and three terminal branches (broken
off). Odd alveole contains an air-bubble.
Fig. 4. _Gorgonetta mirabilis_, n. sp., × 600 1674
A single thread of an anchor-pencil with two quadridentate
spathillæ, a larger proximal and a smaller distal
(terminal).
[Illustration: GORGONETTA.]
PLATE 120.
LEGION PHÆODARIA.
Order PHÆOGROMIA.
Family MEDUSETTIDA.
Fig. 1. _Medusetta codonium_, n. sp., × 400 1668
Fig. 2. _Medusetta quadrigata_, n. sp., × 400 1668
The central capsule is visible in the upper half, the
phæodium in the lower half of the shell-cavity.
Fig. 3. _Medusetta tetranema_, n. sp., × 400 1669
Fig. 4. _Medusetta craspedota_, n. sp., × 400 1669
Fig. 5. _Gazelletta hexanema_, n. sp., × 300 1671
Fig. 6. _Gazelletta bifurca_, n. sp., × 300 1672
A single alveolate foot.
Fig. 7. _Gazelletta macronema_, n. sp., × 200 1671
Oral view of the shell.
Fig. 8. _Gazelletta macronema_, n. sp., × 800 1671
Three joints of an alveolate foot.
Fig. 9. _Gazelletta cyrtonema_, n. sp., × 300 1671
The upper part of the shell encloses the central capsule
with its nucleus. The voluminous phæodium is prominent
over the mouth.
Fig. 10. _Gazelletta orthonema_, n. sp., × 200 1671
The central capsule and its nucleus are visible in the
shell-cavity.
Fig. 11. _Gazelletta schleinitzii_, n. sp., × 400 1673
Oblique apical view, with the enclosed central capsule, the
nucleus of which contains numerous nucleoli.
Fig. 12. _Gazelletta schleinitzii_, n. sp., × 300 1673
A single alveolate foot.
Fig. 13. _Gazelletta trispathilla_, n. sp., × 400 1673
The middle part of a foot.
Fig. 14. _Gazellatta robusta_, n. sp., × 300 1673
The base of a foot, exhibiting the pores of the alveoli.
Fig. 15. _Gazelletta studeri_, n. sp., × 400 1673
The distal end of a foot; four alveoli filled up by
air-bubbles.
Fig. 16. _Gazelletta dendronema_, n. sp., × 300 1674
A part of the velum, seen from the inside. The alveoles are
partly filled by air.
[Illustration: 1.-4. MEDUSETTA, 5.-16. GAZELLETTA.]
PLATE 121.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family COELODENDRIDA.
Fig. 1. _Coelodendrum furcatissimum_, n. sp., × 50 1735
A complete specimen with the central capsule and the big
phæodium. The spherical calymma envelops almost the
entire skeleton.
Fig. 2. _Coelodendrum furcatissimum_, n. sp., × 300 1735
A distal branch with its terminal ramification.
Fig. 3. _Coelodendrum furcatissimum_, n. sp., × 100 1735
One valve of the shell, with its galea and the four hollow
forked tubes arising from it.
Fig. 4. _Coelodendrum furcatissimum_, n. sp., × 100 1735
The central capsule with its nucleus; on the left side one
valve of the closely enveloping shell (seen in vertical
section), and its galea with the origin of the four
tubes.
Fig. 5. _Coelodendrum serratum_, n. sp., × 400 1737
A flabellate terminal branch.
Fig. 6. _Coelodendrum flabellatum_, n. sp., × 150 1737
A flabellate terminal branch.
Fig. 7. _Coelodendrum spinosissimum_, n. sp., × 300 1735
Forked distal end of a terminal branch.
Fig. 8. _Coelodendrum cervicorne_, n. sp., × 150 1736
One valve of the shell, with its galea and the four tubes
arising from it. A network of protoplasm connects the
distal branches.
Fig. 9. _Coelodrymus ancoratus_, n. sp., × 50 1738
A complete specimen, with the central capsule and the
enveloping phæodium. The surface of the spherical
calymma is covered by a dense network, from which arise
numerous, anchor-bearing, radial tubules.
Fig. 10. _Coelodrymus ancoratus_, n. sp., × 150 1738
A small piece of the superficial network of the skeleton,
with the zigzag radial tubules arising from it, each of
which bears an anchor with two recurved denticulate
teeth on the distal end.
[Illustration: 1.-8. COELODENDRUM, 9. 10. COELODRYMUS.]
PLATE 122.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family COELOGRAPHIDA.
Fig. 1. _Coelotholus octonus_, n. sp., × 30 1749
The entire bivalved shell, seen obliquely from the dorsal
and somewhat from the right side, enveloped by the
yellowish calymma.
Fig. 2. _Coelotholus octonus_, n. sp., × 100 1749
One valve of the shell (_h_) with its large galea and the
origin of the three styles. The base of the two lateral
styles (_g_^1, _g_^2) is connected by two latticed
lateral frenula (_b_^1, _b_^2) with the mouth (_m_) of
the rhinocanna (_t_). The odd style (_g_^3) is free.
Fig. 3. _Coelothauma duodenum_, n. sp., × 20 1750
The entire shell, seen from the dorsal side. The long
styles are enveloped by the yellowish calymma.
Fig. 4. _Coelothauma duodenum_, n. sp., × 80 1750
One valve of the shell (_h_), seen from the apical side;
_t_, rhinocanna; _m_, its mouth; _b_^1, _b_^2, the two
lateral frenula; _g_^1, _g_^2, the two paired styles;
_g_^3, the odd style.
Fig. 5. _Coelothauma duodenum_, n. sp., × 80 1750
One valve of the shell, seen in profile. Characters as in
fig. 4.
Fig. 6. _Coelothamnus bivalvis_, n. sp., × 30 1751
The entire shell, enveloped by the yellowish calymma, seen
from the left side; between the two valves is the
central capsule, with nucleus and astropyle.
Fig. 7. _Coelothamnus bivalvis_, n. sp., × 100 1751
A single lateral anchor-pencil.
Fig. 8. _Coelothamnus bivalvis_, n. sp., × 200 1751
Distal end of a style, with its anchor-pencils.
Fig. 9. _Coelothamnus bivalvis_, n. sp., × 400 1751
A single anchor-thread, with its quadridentate terminal
spathilla.
[Illustration: COELOTHOLUS.]
PLATE 123.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family CONCHARIDA.
(The central capsule is coloured red in the figures of this
plate, the phæodium green).
Fig. 1. _Concharium diatomeum_, n. sp., 1717
Dorsal view. The central capsule (red) exhibits above the
anterior tubular main-opening (astropyle), and below
the two small posterior lateral openings (right and
left parapylæ).
Fig. 2. _Concharium bivalvum_, n. sp., × 150 1717
Dorsal view. The central capsule is visible in the lower
part, the margin of the two valves in the upper part of
the figure.
Fig. 2_a_ exhibits the two smooth lateral margins of the
valves, catching into one another. (Lateral view).
Fig. 3. _Concharium nucula_, n. sp., 1717
The dorsal valve alone, seen from the outside.
Fig. 4. _Concharium bacillarium_, n. sp., 1718
Lateral view from the smooth margin, by which the two
valves are united.
Fig. 5. _Conchasma radiolites_, n. sp., × 300 1719
Lateral view. In the aboral half of the shell-cavity lies
the red central capsule, in the oral half the green
phæodium.
Fig. 6. _Conchasma sphærulites_, n. sp., × 300 1719
Lateral view. On the aboral pole the two horns of the
hinge.
Fig. 7. _Conchellium tridacna_, n. sp., × 200 1720
Oblique lateral view (from the right and ventral side).
Fig. 7_a_. Three pores of the same, with their hexagonal
frames and six internal denticles, × 400
Fig. 8. _Conchopsis carinata_, n. sp., × 150 1725
Lateral view, from the left side.
Fig. 9. Conchopsis lenticula, n. sp., × 150 1726
Lateral view, from the right side. The two membranes of the
central capsule are separated by a wide interval in
this and the preceding figure. The nucleus contains
numerous nucleoli.
Fig. 9_a_. Two of the peculiar cells, which are contained
in the green phæodium in large numbers, × 400
[Illustration: 1.-4. CONCHARIUM, 5. 6. CONCHASMA, 7. CONCHELLIUM, 8. 9.
CONCHOPSIS.]
PLATE 124.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family CONCHARIDA.
Fig. 1. _Conchidium terebratula_, n. sp., × 400 1721
Lateral view, from the left side.
Fig. 2. _Conchidium terebratula_, n. sp., × 800 1721
A piece of the frontal girdle-fissure, with the teeth of
both valves catching into one another.
Fig. 3. _Conchidium rhynchonella_, n. sp., × 200 1722
Lateral view, from the left side.
Fig. 4. _Conchidium leptæna_, n. sp., × 300 1722
Girdle-fissure with the teeth, seen from the left side.
Fig. 5. _Conchidium leptæna_, n. sp., × 800 1722
A single tooth with its base.
Fig. 6. _Conchidium thecidium_, n. sp., × 300 1721
Lateral view, from the left side. In the oral part of the
shell-cavity the dark phæodium, in the aboral part the
central capsule with two nuclei (a dorsal and a
ventral).
Fig. 7. _Conchidium argiope_, n. sp., × 300 1722
Oblique oral view (half from the anterior, half from the
left side).
Fig. 8. _Conchidium argiope_, n. sp., × 300 1722
Dorsal valve, from below.
Fig. 9. _Conchidium argiope_, n. sp., × 600 1722
A piece of the valve margin, with four teeth.
Fig. 10. _Conchonia diodon_, n. sp., × 200 1723
Lateral view, from the left side. In the anterior part of
the shell-cavity the dark phæodium, in the posterior
part the central capsule with the nucleus. The two
valves are connected at the posterior hinge by a
ligament (to the right in the figure).
Fig. 11. _Conchonia diodon_, n. sp., × 400 1723
Mouth of the shell, with its two lips, seen from the oral
pole.
Fig. 12. _Conchonia diodon_, n. sp., × 400 1723
A piece of the valve-margin, with four teeth.
Fig. 13. _Conchonia triodon_, n. sp., × 300 1724
Ventral valve, seen from the lower face.
Fig. 14. _Conchonia triodon_, n. sp., × 300 1724
Dorsal valve, seen from the left side.
Fig. 15. _Conchoceras caudatum_, n. sp., × 300 1727
Lateral view, from the left side.
Fig. 16. _Conchoceras cornutum_, n. sp., × 200 1728
Lateral view, from the left side.
[Illustration: 1.-14. CONCHIDIUM, 15. 16. CONCHOCERAS.]
PLATE 125.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family CONCHARIDA.
Fig. 1. _Conchopsis aspidium_, n. sp., × 150 1726
Lateral view, from the left side.
Fig. 2. _Conchopsis aspidium_, n. sp., × 300 1726
The hinge of another specimen, in which the two valves are
connected by a ligament (as in figs. 8 and 9, Pl. 123).
Fig. 3. _Conchopsis orbicularis_, n. sp., × 200 1725
Lateral view, from the left side.
Fig. 4. _Conchopsis navicula_, n. sp., × 150 1727
Lateral view, from the right side. In the lower (posterior)
half of the figure is visible the central capsule with
its dark nucleus, in the upper (anterior) half the
phæodium with two broad sagittal wings.
Fig. 5. _Conchopsis navicula_, n. sp., × 400 1727
Three single pores with their hexagonal external frame and
the dilated internal ovate or ampullaceous channel.
Fig. 6. _Conchopsis navicula_, n. sp., × 400 1727
Hinge of the shell, from the right side.
Fig. 7. _Conchopsis compressa_, n. sp., × 150 1725
Lateral view from the left side. The triangular central
capsule with the dark nucleus is visible.
Fig. 8. _Conchopsis compressa_, n. sp., × 150 1725
Dorsal view of the upper valve with its keel.
Fig. 9. _Conchopsis pilidium_, n. sp., × 80 1726
The two valves separated and seen obliquely, half from the
lateral, half from the internal side. The inner opening
of each valve is bordered and partly closed by a broad
horizontal velum or diaphragm like the deck of a boat.
[Illustration: CONCHOPSIS.]
PLATE 126.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family COELOGRAPHIDA.
Figs. 1-1_c_. _Coelographis regina_, n. sp., 1752
Fig. 1. Lateral view. The central capsule it visible
between the two valves of the inner shell, the galeæ of
which are filled by the phæodium, × 20
Fig. 1_a_. Dorsal view (somewhat obliquely from the left
side). The galeæ appear triangular, × 20
Fig. 1_b_. Basal view, × 20
Fig. 1_c_. Distal end of a style, × 300
Figs. 2-2_b_. _Coelodecas sagittaria_, n. sp., 1755
Fig. 2. One valve of the shell, seen from the outside, × 30
Fig. 2_a_. Distal end of a style, × 300
Figs. 3-3_a_. _Coelostylus bisenarius_, n. sp., 1756
Fig. 3. Lateral view of the bivalved shell. The central
capsule is visible between the two valves of the inner
shell, the galeæ of which are filled by the phæodium, × 20
Fig. 3_a_. Distal end of a style, × 300
Figs. 4-4_a_. _Coelagalma mirabile_, n. sp., 1759
Fig. 4. Dorsal view of the bivalved shell, × 30
Fig. 4_a_. Basal view of the bivalved shell, × 10
[Illustration: 1. COELOGRAPHIS, 2. COELODECAS, 3. COELOSTYLUS, 4.
COELAGALMA.]
PLATE 127.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family COELOGRAPHIDA.
Fig. 1. Coeloplegma murrayanum, n. sp., × 40 1757
One valve of the bivalved shell, seen from the inside, of
the usual ovate form.
Fig. 2. _Coeloplegma murrayanum_, n. sp., × 40 1757
One valve of the bivalved shell, seen from the inside, of
the rarer polyhedral form, which may be distinguished
as a different species (_Coeloplegma tritonis_, compare
p. 1758). _h_, hemispherical inner valve; _g_, galea;
_s_, its base.
Fig. 3. _Coeloplegma murrayanum_, n. sp., × 40 1757
The entire shell, seen from the base of the aboral pole
(dorsal and ventral valve connected by delicate teeth,
catching into one another).
Fig. 4. _Coeloplegma murrayanum_, n. sp., × 100 1757
_h_, The two hemispherical inner valves of the shell, seen
from the right side; _n_, the central nucleus inside
the central capsule; _d_, the astropyle; _g_, the
galea; _t_, the nasal tube, arising from its base; _m_,
its mouth; _p_, the phæodium, which is partly thrown
out by the nasal openings, filling up the galea and
nasal tube.
Fig. 5. _Coeloplegma murrayanum_, n. sp., × 200 1757
_h_, The two hemispherical inner valves of the shell and
the enclosed central capsule, seen from the oral side;
_d_, the radiate operculum of the astropyle, seen in
the frontal fissure between the two valves; _n_, the
nucleus; _k_, the crystals; _g_, galea; _g_^1-_g_^5,
the styles arising from the galea; _t_, nasal tube;
_m_, mouth of it.
Fig. 6. _Coeloplegma murrayanum_, n. sp., × 600 1757
Oral part of a central capsule, in profile. _o_, Opening of
the proboscis; _d_, radiate operculum of the astropyle,
which gives rise to the proboscis; _e_, the outer, _i_,
the inner membrane of the capsule; _k_, groups of
crystals; _n_, nucleus.
Fig. 7. _Coeloplegma murrayanum_, n. sp., ×1000 1757
Three single groups of crystals, taken from the central
capsule.
Fig. 8. _Coeloplegma murrayanum_, n. sp., × 300 1757
One inner valve of the shell, in profile. _h_,
hemispherical valve; g, galea; _g_^1-_g_^5, the tubes
arising from it; _t_, rhinocanna or nasal tube; _m_,
its mouth; _b_, frenulum.
Fig. 9. _Coeloplegma murrayanum_, n. sp., × 400 1757
_g_, The galea; _t_, rhinocanna of one inner valve; _m_,
its mouth; _p_, phæodella filling up both the galea and
the mouth of the rhinocanna. _g_^1-_g_^5, the styles
arising from the galea; _s_, sieve-plate, which
separates the cavity of the galea from the
hemispherical valve (_h_). View in profile.
Fig. 10. _Coeloplegma murrayanum_, n. sp., × 300 1757
An anchor-pencil of the outer shell.
Fig. 11. _Coeloplegma murrayanum_, n. sp., ×1000 1757
A single anchor-thread of a pencil.
Fig. 12. _Coeloplegma murrayanum_, n. sp., × 300 1757
Terminal branches of a style.
Fig. 13. _Coeloplegma murrayanum_, n. sp., ×1000 1757
A single terminal branch of a style.
[Illustration: (FAR-ÖER-CHANNEL) COELOPLEGMA MURRAYANUM.]
PLATE 128.
LEGION PHÆODARIA.
Order PHÆOCONCHIA.
Family COELOGRAPHIDA.
Fig. 1. _Coelospathis ancorata_, n. sp., × 50 1754
Lateral view of the entire shell. The central capsule is
visible between the two valves of the inner shell. The
galeæ and rhinocannæ of the two inner valves are filled
up by the black phæodium.
Fig. 2. _Coelospathis ancorata_, n. sp., × 100 1754
The two valves of the inner shell; the galeæ and rhinocannæ
of which are filled up by the black phæodium. Between
the mouth of the two rhinocannæ is prominent the
proboscis of the astropyle, arising from the radiate
operculum of the central capsule. The latter contains
numerous crystals and a big dark nucleus. Lateral view.
Fig. 3. _Coelospathis ancorata_, n. sp., × 200 1754
The rhinocanna or the nasal tube of one valve, and the
latticed frenulum which connects its mouth with the top
of the galea.
Fig. 4. _Coelospathis ancorata_, n. sp., × 80 1754
Distal end of a style.
Fig. 5. _Coelospathis ancorata_, n. sp., × 200 1754
Terminal branches of a style.
Fig. 6. _Coelospathis ancorata_, n. sp., × 600 1754
Lateral branch of a style, with an anchor-pencil.
Fig. 7. _Coelospathis ancorata_, n. sp., × 300 1754
The lateral margins of the latticed valves of the outer
shell or mantle, catching into one another, without
being connected directly.
Fig. 8. _Coelospathis octostyla_, n. sp., × 300 1754
Terminal branches of a style.
Fig. 9. _Coelospathis octodactyla_, n. sp., × 400 1755
A single terminal branch of a style.
[Illustration: COELOSPATHIS.]
PLATE 129.
LEGION ACANTHARIA.
Orders ACTINELLIDA et ACANTHONIDA.
Families ASTROLOPHIDA, LITHOLOPHIDA, CHIASTOLIDA et ASTROLONCHIDA.
Fig. 1. _Actinelius primordialis_, n. sp., × 100 730
The red central capsule, coloured by carmine, contains
numerous intensely stained nuclei.
Fig. 2. _Litholophus decapristis_, n. sp., × 300 735
The conical central capsule contains numerous nuclei. The
calymma exhibits on the distal end of each spine a
coronet of myophriscs.
Fig. 3. _Chiastolus amphicopium_, n. sp., × 150 738
Sixteen diametral spines pierce the spherical, red coloured
capsule. The conical sheets of the calymma bear
myophriscs.
Figs. 3_a_, 3_b_. Two isolated diametral spines exhibiting
the peculiar spiral revolution at their central part, × 300
Fig. 4. _Xiphacantha ciliata_, n. sp., × 300 761
The spherical central capsule is coloured red. The
yellowish calymma envelops the radial spines
completely. The polygonal network of lines, in which
the radiating pseudopodia are symmetrically arranged,
is partly visible.
Fig. 5. _Xiphacantha ciliata_, n. sp., × 300 761
The central part of the skeleton, exhibiting the central
junction of the radial spines.
Fig. 6. _Acanthometron dolichoscion_, n. sp., × 300 743
Central capsule of a young specimen; in its upper half the
peculiar kidney-shaped nucleus is visible, with its
invagination; in the lower half some nucleated yellow
cells are visible (intracapsular xanthellæ). These and
the nucleus are stained by carmine.
Fig. 7. _Acanthometron dolichoscion_, n. sp., × 300 743
Cleavage of an isolated nucleus, with four buds.
Fig. 8. _Acanthometron dolichoscion_, n. sp., × 300 743
A central capsule with four large budding nuclei; and
numerous small spherical nuclei produced by gemmation.
Fig. 9. _Acanthonia tetracopa_, n. sp., × 400 749
Central capsule of s young specimen, with a large,
irregularly lobate nucleus.
Fig. 10. _Acanthonia tetracopa_, n. sp., × 400 749
An isolated nucleus, exhibiting the peculiar invagination,
with its circular folds, and the connection with the
flatly conical nucleolus.
Fig. 11. _Acanthonia tetracopa_, n. sp., × 800 749
Four flagellate spores.
[Illustration: 1. ACTINELIUS, 2. LITHOLOPHUS, 3. CHIASTOLUS, 4.-11.
ACANTHONIA.]
PLATE 130.
LEGION ACANTHARIA.
Order ACANTHONIDA.
Family ASTROLONCHIDA.
Fig. 1. _Acanthometron bulbiferum_, n. sp., × 300 745
Fig. 2. _Acanthometron cylindricum_, n. sp., × 200 743
Fig. 3. _Lithophyllium gladiatum_, n. sp., × 200 754
Fig. 4. _Stauracantha quadrifurca_, n. sp., × 300 764
Fig. 5. _Stauracantha orthostaura_, n. sp., × 200 762
Fig. 6. _Phatnacantha icosaspis_, n. sp., × 400 765
Fig. 7. _Pristacantha polyodon_, n. sp., × 300 766
Fig. 8. _Pristacantha dodecodon_, n. sp., × 300 766
Only the central parts and the leaf-cross.
Fig. 9. _Pristacantha octodon_, n. sp., × 200 765
[Illustration: 1. 2. ACANTHOMETRON. 3. LITHOPHYLLIUM. 4.-6. STAURACANTHA.
7.-9. PRISTACANTHA.]
PLATE 131.
LEGION ACANTHARIA.
Order ACANTHONIDA.
Family QUADRILONCHIDA.
Fig. 1. _Quadrilonche mesostaura_, n. sp., × 300 777
Fig. 2. _Quadrilonche platystaura_, n. sp., × 100 777
Fig. 3. _Xiphoptera dodecactena_, n. sp., × 200 778
The central capsule with the central part of the skeleton.
Fig. 4. _Lonchostaurus bifurcus_, n. sp., × 300 773
Fig. 5. _Lonchostaurus crystallinus_, n. sp., × 400 773
Fig. 6. _Lonchostaurus rhomboides_, n. sp., × 200 772
The radial spines are completely enclosed in the rhombic
calymma, the surface of which is covered with small
plates, similar to those in the shell of the
Sphærocapsida.
Fig. 7. _Zygostaurus amphithectus_, n. sp., × 300 774