GALLERY.] NATURAL HISTORY. 
89 
The family of Nautilidje have two series of very numerous tentacles, 
and a large fleshy appendage on the head, serving the animal as a foot 
for locomotion; the shell is exterior, with simple concave septa between 
the chambers, and the syphon in the centre or near the inner edge. The 
only genus of this family which is now known in the recent state, is the 
Nautilus , which has a regular involuted shell with the whorls close 
together. The fossil genera are numerous, and exhibit many modi¬ 
fications of form: involutes like the Nautili, crook-shaped like Lituites, or 
quite straight as the Orthocera. The Cyrtoceras is involute with whorls 
separate from each other, like Crioceras. 
The family of Goni atidae are fossil shells, which only differ from the 
former in the division or septa between the chambers being flexuous or 
angular. The Goniatites are subglobular involute shells, like the Nautili , 
but more swollen, and the Ceratites are simply curved like a horn. 
The following List exhibits the series of genera of Mollusca at one 
view, and the numbers indicate the Table Cases in this Gallery in 
which the genera in the collection are placed. 
Sub Kingdom. 
Mollusca. 
Class I. 
Gasteropoda. 
Section I. 
Ctenobran- 
chiata. 
Order I. Zoophaga. 
Fam. 1. Strombidoe. 
S trombus, 1. 
Terebellum, 1. 
Seraphys, 2. 
Pteroceras, 2. 
Rostellaria, 2. 
Fam, 2. Muricidce. 
a. Ranella, 2, 
Triton, 2. 
Persona, 3, 
Apollon, 3. 
~\Enzina, 3. 
Pollia, 3. 
b. Murex, 3. 
Brontes, 3. 
Trophon, 3. 
Vitularia, 3. 
Chicoreus, 3, 4. 
Typhis, 4. 
e. Pleurotoma, 4. 
Perronia, 4. 
Melatoma, 4. 
Clavatula, 4. 
Drillia, 4. 
Conus, 5, 6. 
Cylinder, 5. 
Hermes, 6. 
Fusus, 6, 7. 
Pyrula, 7. 
Pseudoliva, 7. 
Tritonium, 7. 
d. Lathirus, 7. 
Polygona, 7. 
Turbinellus, 8. 
Cynodonta, 8. 
Fasciolaria, 8. 
Cancellaria, 8, 
e. Struthiolaria, 8. 
Aporrha'is, 8. 
Fam. 3. Buccinidce. 
а. Cassis, 8. 
Cassidea, 9. 
Cassidaria, 9. 
Cythara, 9. 
Dolium, 9. 
б. Harpa, 9. 
Purpura, 10. 
Monoceros, 10. 
Planaxis, 10. 
Quoyia, 10. 
Concholepas, 10. 
Ricinula, 10. 
Magilus, 10. 
Leptoconchus, 10. 
c. Buccinum, 10. 
Terebra, 10. 
Bullia, 10. 
Nassa, 11. 
Demoulia, II. 
Ringicula, 11. 
Litiopa, 11. 
Phos, 11. 
Cyllene, 11. 
d. Oliva, 11. 
Lamprodoma, 'll. 
Agaionia, 11. 
Olivina, 11. 
Scaphula, 11. 
Olivella, 11. 
Ancilla, 11. 
Eburna, 11. 
Fam. 4. Volutidce. 
Cymbium, 12. 
Volutella, 12. 
Voluta, 12, 13, 14. 
Mitra, 14. 
/Vulpecula, 14. 
^Turris, 14. 
Yolvaria, 14. 
Imbricaria, 14. 
Marginella, 14. 
Hyalina, 14. 
Persicula, 14, 
Fam. 5. Cypraada. 
Cypraea, 15. 
Cyprovula, 15. 
Luponia, 15. 
Trivia, 16. 
Erato, 16. 
Ovula, 16. 
Calpurnus, 16. 
Radius, 16. 
Corioeeila, 16. 
Order II. Phyto- 
phaga. 
1. Podophthalma. 
Fam. 1. Turbinidce. 
Turbo, 16. 
Batillus, 16. 
Imperator, 16. 
Trochiscus, 16. 
Phasianella, 16. 
Thicolia, 16. 
Fam. 2. Trochidce. 
Pyramis, 17. 
Cardinalia, 17. 
Troehus, 17- 
Polydonta, 17. 
Clangulus, 17. 
Phorcus, 17. 
Ziziphinus, 17. 
Cantharidus, 17. 
Thalotia, 17- 
Monodonta, 17. 
Gibbium, 17. 
Gibbula, 17. 
Rotelia, 17- 
Livona, 17. 
Talopia, 17. 
Camitia, 17, 
Delphinula, 17. 
Liotia, 17. 
Fam. 3. Stomatel- 
lidce. 
Stomatella, 18. 
Gena, 18. 
Fam. 4. Haliotidce. 
Stomatia, 18. 
Haliotis, 18. 
Padollus, 18. 
Deridobranchus, 18. 
Scissurella, 18. 
Pleurotomaria, 18. 
Ralia. 
Murchisonia. 
Fam. 5. Fissurellida ?. 
Parmophorus, 18. 
Emarginula, 18. 
Diodora, 18. 
Fissurella, 18. 
Macrochisma, 18. 
Pupillia, 18. 
Lucapina, 18. 
Fissurellidia, 18. 
Fam. 6. Dentaliadce. 
Dentalium, 18. 
Entalis, 18. 
Fam. 7* Lottiadab . 
Lottia, 18. 
Fam. 8. Neritida , 
Nerita, 18. 
Pileolus, 18. 
Culana, 18. 
Neritina, 18. 
Clithon, 18. 
Dostia, 18. 
Velates, 18. 
Navicella, 18. 
Fam. 9. Ampulla - 
riacUe. 
Ampullaria, 19. 
Marisca, 19. 
Lanistes, 19. 
Asolene, 19. 
Ampulloidda, 18. 
Paludomus, 18. 
Fam. 10. Ianthinidcs . 
lanthina, 19. 
Fam. 11. Atlantidce . 
Atlanta, 12. 
Helicophora. 
