40o INDEX. 



resemblance to Cerithium, 142. ; 

 to Hostel laria,! 142. ; to Pterocera, 

 142. 



Aplustra, 360. A. pulchella, 249. 



Aplysia, sea hares, 25. 30. 238. 248. 

 Typical characters of, 250. 359. 



Aplysianas, sub-family, 359. 



Aptera, a sub-typical class, 51. 53. 



Area, genus, 383. 



Arc-Ida;, or arch-shells, 260. 382. 



Argonauta, 48. 



Aristotle, the acknowledged leader 

 of zoological science, 13. 



Arrangement, natural, 295. 



Aspergillium, the animal lives in 

 sand, 362. 



Atrachia, tribe of, 255, 256. 377. 

 Circle of, perfected, 258. Analo- 

 gies of, 258. 



Auricula, 171. 209. 337- Genuine, 

 176. 178. Sub-genus, 180. Spe- 

 cies of, 180. 



Aves, circle of, perfectly developed, 

 41. Certain analogies with typi- 

 cal Gasteropoda, &c., 49. 



Avicula, description of, 257. 386. 



Aviculidee, the, 257. Muscles and 

 pearl oysters, 383. 



Azeca, sub-genus, 183. 



B. 



Balia, 182, 334. 



Barnacles, classification of, 25. 28. 



Their analogy with cuttlefish, 52. 

 Belemnites, fossil, 48. 

 Bibliography of the testaceous 



Mollusca, notice of the, 13, et sea. 

 Bicatillus, 354. 

 Biconia, 355. 

 Birostra, form of, 325. 

 Bivalves, Aristotle's designations 



of the molluscous, 13. 21. Ace- 



phala, 25. Double shells, as the 



oyster and cockle, 27. All 



aquatic, 33. Sub-typical, 35. 



Devoid of eyes and tentacula, 36. 



Some analogy of, with Aves, 50. 



Order of Dithyra, 254. 361. Flu- 



viatile, 259. 

 Blainville, M. de, system of, 17. 



His nomenclature objectionable, 



13. 17. 



Brachidontes, 383. 

 Brachytoma, new genus, 154. 314. 

 Branch iopoda, of Cuvier, 23. 47. 



Anomian shells, 25. 47. 256. 

 Buccinina?, or whelks, 63. 71. Base 



abrupt and notched, 73. 97. 301. 

 Buccinum, genus, 62. 96. 302. 



B. Achatinum, 74. B. lasvigatum, 



74. B. plumbeum, 82. B. strom- 



bioides, 123. 

 Buliraus, description of, 170. 176. 



335. B. proper, 177. Sub-genus, 



178. Analogies of its sectional 



types, 179. 

 Bulimi, conical spire of the, 163. 



177. Sub-genera of, 178. Circle 



of, 181. 

 Bulimulus undulatus, antiquensis, 



and proteus, 177. 335. 

 Bulla, conformation of, 25. 55. 360. 



Connected with the Cyprzeidae, 



59. 238. B. naucum, 249. B. 



aperta, 252. 

 Bulling, sub-family of, 248. 251. 



359. 



Bullinula, of Beck, 360. 

 Bursatella, structure of, 251. 359. 



C. 



Calceola, 382. C. truncata, 289. 



Calliostoma, sub-genus, 218, 219. 

 351. 



Callithea, conformation of, 320. 



Calliscapha, 380. 



Calyptrea, 230, 231. 354. Natural 

 station of, 233. C. chinensis, 234. 



Cancellaria, small incurved chan- 

 nel of, 79.305. 



Cancilla, described, 320. 



Canthapleura, 357. 



Canthella, 202. 



Canthidomus, 342. 



Canthorbis, diversified sub-genera, 

 216. 349. Sub-genera and ana- 

 logies of, 224 



Canthyria, 276. 378. 



Capsa, 373. 



Capulis, 244. 



Caracolla, 328. 



Cardissa, 257. 259. 373. 



Cardita, 375. 



Cardium, 373. 



Carinea, 326. 



Carinaria, 48. 



Carinidea, sub-genus, 216. 350. 



Carrier shells, 212. 217. 228. 



Cassida?, analogies of, 89. 100. 



Cassidaria, of Lamarck, 69. 71. 299. 



Cassidea, 66. Form, and species of, 

 299. 



Cassinas, or helmet-shells, 63. 65. 

 297. Separate circle of affinity, 

 66. 95. Analogies to the Gaste- 

 ropoda, 66. 



Cassis, genus, 65. 68. 71. Species 

 of, 298. 



Castalia, of Lamarck, 284. 379. C. 

 cordata, 284. 



Cemaria, of Leach, 243. 356. 



Cephalopoda, provided with a back- 

 bone, form an order connected 

 alike with the Vertebrata and 

 Mollusca, 5, et seq. Perfection 

 of sight of, 8. Lamarck's table 



