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Brood-pouch of Thecidium mediterraneum. Part of the wall of the pouch has been removed to show the clusters
1. Brood-pouch of Thecidium mediterraneum. Part of the wall of the pouch has been removed to show the clusters of larvae.
1. Mouth, overhung by lip.
2. One of the two median tentacles which are enlarged and modified to bear the larvae.
3. Wall of brood-pouch into which the median tentacles are folded.
4. Larva attached to the swollen end of the tentacles.
Limnaea peregra Mull.; e,e, eyes; t,t, tentacles (A) Helix nemoralis Mull.: e,e, eyes; t,t, tentacles;
2. Limnaea peregra Mull.; e,e, eyes; t,t, tentacles (A)
Helix nemoralis Mull.: e,e, eyes; t,t, tentacles; p.o, pulmonary orifice (B)
Young Quahog. 1 millimeter (1/25 inch) in length, attached to sand grains by the byssus (B). The ssipphon
3. Young Quahog.
1 millimeter (1/25 inch) in length, attached to sand grains by the byssus (B). The ssipphon (S) consists of two parts, an incurrent encircle dby twelve tentacles, through which the water enters the mantle chamber of the animal, and an excurrent with four tentacles and filmy telescopic tube through which the water passes out of the mantle cavity. The byssus areises from a gland on the under side of the foot (ft).
Oliva textilina showing how the front part of the food (f) is developed into a sort of fender, the propordium
4. Oliva textilina showing how the front part of the food (f) is developed into a sort of fender, the propordium (pr); e, e, eyes un.ap, front appendage of mantle; m, ap, hinder appendage of mantle folded into the suture when the animal is at rest; si, siphon; t, t, tentacles
Sigarelus bevigatus, showing extensive development of the propodium (pr.) and metapodium (met.) in a
5. Sigarelus bevigatus, showing extensive development of the propodium (pr.) and metapodium (met.) in a mollusk living in sand (the shell, which covers only the liver and adjacent parts, has been removed): l, liver; s. ap., aperture of brotoscis, here deflected from the median line; t, t, tentacles; f, foot
View of the left half of cistella (Argiope) neapolitiana, which has been cut in two by a median longitudinal
6. View of the left half of cistella (Argiope) neapolitiana, which has been cut in two by a median longitudinal incision, to show the disposition of the organs. Partly diagrammatic. The inorganic part of the shell only is shown. The tubular extensions of the mantle ad the organic outer layer are not indicated, and hence the pores appear open.
1. The ventral valve.
2. The dorsal valve.
e. The stalk.
4. The mouth.
5. Lip which overhangs the mouth and runs all round the tentacular arms.
6. Tentacles.
7. Ovary in dorsal valve.
8. Liver diverticula.
9. Occlusor muscle; its double origin is snown.
10. Internal opening of left nephridium.
11. External opening of left nephridium.
12. Ventral adjustor. The line from 10 crosses the dorsal adjustor.
13. Divaricator muscle.
Bullia laevissima Gmel., showing branchial siphon S; F,F,F, foot; OP, operculum; P, penis; Pr. proboscis;
7. Bullia laevissima Gmel., showing branchial siphon S; F,F,F, foot; OP, operculum; P, penis; Pr. proboscis; T, T, tentacles
Fissurella virescens Sowb, Panama, showing position of the branchiae; Br, branchiae; E, E, eyes; F, foot;
8. Fissurella virescens Sowb, Panama, showing position of the branchiae; Br, branchiae; E, E, eyes; F, foot; M, mantle; T, T, tentacles
Trematode worm (Leucochloridium paradoum Car.) parasite in the tentacles of Succines putris L.
9. Trematode worm (Leucochloridium paradoum Car.) parasite in the tentacles of Succines putris L.
Testacella haliotidea Drap., protruding its pharynx (ph) and radula (r); oe, oesophagua; p.o. pulmonary
10. Testacella haliotidea Drap., protruding its pharynx (ph) and radula (r); oe, oesophagua; p.o. pulmonary orifice; sh, shell; t, tentacles
Example of a heteropod, Carinaria mediterranea Lam., Naples; a, anus; br, branchia; f, food; i, intestine;
11. 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
Way of a Deep-Sea Fish Odontostomus atratus, from the Bay of Bengal and Andaman Sea, 573-870 fathoms.
12. Way of a Deep-Sea Fish
Odontostomus atratus, from the Bay of Bengal and Andaman Sea, 573-870 fathoms. The individual figured, whish is an immature specimen..., has swallowed a cuttle-fish much broader than itself; the eyes and tentacles of the cuttle-fish being visible through the distended abdominal wall of the gorger
Way of a Deep-Sea Fish Odontostomus atratus, from the Bay of Bengal and Andaman Sea, 573-870 fathoms.
13. Way of a Deep-Sea Fish
Odontostomus atratus, from the Bay of Bengal and Andaman Sea, 573-870 fathoms. The individual figured, whish is an immature specimen..., has swallowed a cuttle-fish much broader than itself; the eyes and tentacles of the cuttle-f
Scallops: Early plicated stage. View of the right or lower valve. Note the smooth prodissoconch (pd)
14. Scallops: Early plicated stage. View of the right or lower valve. Note the smooth prodissoconch (pd) and siccoconch (d) areas, with the beginning of the sixteen plications (pl) of the adult. There are four teeth (te) on the byssal notch. (33); Scallop...viewed from left or upper valve (34); View of the anatomy of a slightly older scallop...as seen through the right valve. Note primary, secondary and tertiary eyes (e) and tentacles (t). The outer gill (og) has about twenty-five filaments, and begins to resemble the inner gill (ig) (35); View of right or lower valve of same scallop.... Note the five teeth (te) on the byssal notch (bn) and the beginning of the "ears (er). the two teeth back of the external border of the byssal groove are older, and have rounded rather than the pointed ends of the last formed teeth. The valves have become nearly equal, the hinge line straight, and the byssal groove (bg) can be traced back to the asymmetrical prodissoconch (36); View of upper left.... (37)
  
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