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Terminal portions of the Amphineura, illustrating the gradual degradation of the branchiae, and their
1. Terminal portions of the Amphineura, illustrating the gradual degradation of the branchiae, and their grouping around the anus in that class.
A, Chiton (Hemiartherum) setulosus Carp., Torres Str.; B, Chiton (Leptochiton) benthus hadd., Torres Str.; C, Chaetoderma; D, Neomenia; a, anus; br, br, branchiae; k, k, kidneys; p, pericardium
Dentalium, as seen in longitudinal section (except the foot): S, shell, Mt, mantle; Sa, shell muscle;
2. Dentalium, as seen in longitudinal section (except the foot): S, shell, Mt, mantle; Sa, shell muscle; Mh, mantle-cavity; F, foot, Mk, cephalic prominence or oral cone; T, capfacula; R, radula; D, intestine; l, liver, Af, anus; G, cerebral ganglion; N, kidney; Ge, generative gland
Chiton, ventral view: an, anus; cten, ctenidia; f1, foot; mant, mantle-edge; mo, mouth
3. Chiton, ventral view: an, anus; cten, ctenidia; f1, foot; mant, mantle-edge; mo, mouth
Anatomy of the Carp br, the branchiae, or gill openings; c, the heart; f, the liver; vn, swimming
4. Anatomy of the Carp
br, the branchiae, or gill openings; c, the heart; f, the liver; vn, swimming bladders; ci, intestinal canal; o, the ovarium; u, urethra; a, anus; o', oviduct
Triton anus (Lam.)
5. Triton anus (Lam.)
View of the inner side of a valve of Lingula anatifera (after Frascois), to show the definite arrangement
6. View of the inner side of a valve of Lingula anatifera (after Frascois), to show the definite arrangement of the channels in the mantle:
a, position of mouth; b, position of anus
Lima squamosa Lam., Naples, showing tentacular lobes of mantle (t, t); a, anus; ad, m, adductor muscle;
7. Lima squamosa Lam., Naples, showing tentacular lobes of mantle (t, t); a, anus; ad, m, adductor muscle; br, br, branchiae; f, foot; sh, shell
Chiton squamosus L., Bermuda: A, anus; Br, branchiae; M, mouth
8. Chiton squamosus L., Bermuda: A, anus; Br, branchiae; M, mouth
A. Tectibranchiate opisthobranch, Umbrella mediterranea Lam., Naples; a, anus, br, branchia; f, foot;
9. A. Tectibranchiate opisthobranch, Umbrella mediterranea Lam., Naples; a, anus, br, branchia; f, foot; m, mouth; rh, rhinophores; sh; shell
B. Pteropod, Hyalaea tridentata Frosk., Naples; sh, shell; l, l, swimming lobes of foot
C. Nudibranchiate opisthobranch, Anolis peregrina, Naples: f, foot; c, cerata
Example of a heteropod, Carinaria mediterranea Lam., Naples; a, anus; br, branchia; f, food; i, intestine;
10. Example of a heteropod, Carinaria mediterranea Lam., Naples; a, anus; br, branchia; f, food; i, intestine; m, mouth; p, penis; s, sucker; sh, shell; t, tentacles. Animal swims foot uppermost
Example of the Aplacophora, Neomensia carinata Tullb.; a, anus; gr, Ventral groove; m, mouth
11. Example of the Aplacophora, Neomensia carinata Tullb.; a, anus; gr, Ventral groove; m, mouth
[Quahog Eggs]: Fig.15.--Ciliated gastrula, ten hours after fecundation. The embryo Can now swim through
12. [Quahog Eggs]:
Fig.15.--Ciliated gastrula, ten hours after fecundation. The embryo Can now swim through the water by means of hairlike cilia. The larger cells have become invaginated.
Fig.16.--Trochosphere stage, twelve to fourteen hours after fecundation. The body has elongated and the cilia are now confined to the front end. The opening of the primitive mouth (pm) cn be seen on the lower side, while above is a slight indentation corresponding to the eginning of the shell gland (sg).
Fig.17.--Formation of the shell, which arises at two symmetrical points of calcification, right and left of the median line, and gradually envelops the animal.
Fig.18.--Early veliger swimmer with velum extended from the shell, about thirty-six hours after fecundation. aa, anterior adductor muscle, pa, posterior adductor muscle, s, stomach, a, anus, mt, mouth, v, velum.
Fig.19.--Veliger slightly older than shown in Fig.18. The intesting (i) has elongated, and the liver (l) is more prominent.
Diagrammatic figure of oyster lying in left valve of shell and dissected to show internal organs, (after
13. Diagrammatic figure of oyster lying in left valve of shell and dissected to show internal organs, (after Leuckart and Nitsche); a, mouth; b, stomach; c c c, intestines; d, anus; g, gills by which the animal 'breathes'; f f f, edge of mantle lobe; e e e, shell; h, abductor muscle by which the two valves of the shell are closed; i, nerve; k k, kidney; l, labial palps or mouth plates; n n, liver; o o o, ovary; p, heart in pericardisl space; r, nerve of edge of mantle
Pleuronectes flesus, Young Flounder taken in Mevagissey Harbour, Aporil 2, 1889... pw, pelvid fin (1);
14. Pleuronectes flesus, Young Flounder taken in Mevagissey Harbour, Aporil 2, 1889... pw, pelvid fin (1); Pleuronectes limanda, Larva of dab...new hatc hed, from artificially fertilised egg, March 11, 1889. pt, pectoral fin; yk, yolk (2); Pleuronectes microcephalus, Larva of Merry Sole, March 25, 1889, four days after hatching, from artificially fertilised egg; l, liver; ht, heart (3); Pleuronectes platessa, Larva of Plaice..., February 27, 1889, five days after hatching, from artificially fertilised egg; a, anus; nch, notochord (4); Rhombus laevis, Young brill, taken at surface of water in Sutton Pool, June 1, 1889 (5)
Solea vulgaris : Body cavity of the male Common Sole after all the viscera have been removed except the
15. Solea vulgaris : Body cavity of the male Common Sole after all the viscera have been removed except the testes and kidneys, which are left in situ.... The wooden rod passes through the anus, the black bristle passes into the urinary bladder, which lies beneath the cords containing the testicular ducts
Solea vulgaris : Body cavity of the female Common Sole after all the viscera have been removed except
16. Solea vulgaris : Body cavity of the female Common Sole after all the viscera have been removed except the ovary and kidneys, which are lift in situ. The wooden rod passes through the anus, the blue probe pass through the external aperture of the common oviduct up into the left ovary, the black bristle passes into the urinary bladder which lies beneath the oviduct
Poche a encre des mollusques cephalopodes a, Coeur; b, branchie; c, estomac; d, anus; e, poche a encre
17. Poche a encre des mollusques cephalopodes
a, Coeur; b, branchie; c, estomac; d, anus; e, poche a encre
   
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