INDEX. 



The ajTionyms are printed in italics, and the pages where the genera are described ar« 

 indicated by an asterisk (*). 



Abbreviations, 49. 

 Abra, 4S3. 

 Abralia, 171. 

 Acantkinn, 223. 

 Acanthochites, *284. 

 Acanthodoria, *332. 

 Acanthopleura, *283. 

 Acanthoteuthis, *175. 

 Acanthothyris, 375. 

 Acardo, 323, 454. 

 Acavus, *2S9. 

 Acephala, 5. 

 Acera, *316. 319. 

 Achatina, «292. 

 Achatinella, *292. 

 Acicula, »310. 

 Aciculidse, *310. 

 Aclesia, ♦321. 

 Aclis, *240. 

 Acmaea, *281. 

 Acmaea, 311. 

 Aane, 311. 

 Acoeli, *174. 

 Acostcea, 435. 

 Acroculia, 277. 

 Acroloxus, 302. 

 Acrotreta, *390. 

 ActcEon, 313, 339. 

 Acteonella, *314. 

 Acteonia. *339. 

 Acteonina, *314. 

 Actiiiocamax, 175. 

 Actinoceras, *191. 

 Actinoconchns, 373. 

 Actinocj'clus, *329. 

 Actinodonta, 432. 

 Acuarii, *174. 

 Aciis, 220. 

 Adacna, *4o4. 

 AdamsieUa, *308. 

 Adductor impressions, 401. 

 Adelopneumonay 285. 

 Adeorbis, *266. 

 Admete, 55, *216. 

 .ZEgean Sea Shells, 67. 

 ^girus, 327, *330. 

 Enigma, 408. 

 ^olidae, *33o. 

 .^olis, 328, *335. 

 .Estivation, 13. 

 .Mheria, *435. 

 Affinities, 45. 



African region, 97. 

 Aganides, 196. 

 Agaronia, *227. 

 Agina, 490. 

 Alasmodon, 433. 

 Alcadia, *310. 

 Alcynus, 265. 

 Alderia. *338. 

 Aleutian province, 76. 

 Alexia, *305. 

 Alicula, 316. 

 Allorisma, 496, 498. 

 Alvania, 240. 

 Amalthea, *278. 

 Amalthei, *198. 

 Amathina, *277. 

 Ambonychia, *417. 

 Amicula, 284. 

 Ammonites, 35, 37, *197. 

 AmmonitidEe, *195. 

 Amnicola, *247. 

 Amoura, 239. 

 Amphibola, *259. 

 Amphibulima, 290. 

 Amphiceras, 234. 

 Amphicheena, *486. 

 Amphidesma, 431. 483, 



497. 

 Amphidonta, 407. 

 Amphipeplea, *301. 

 AmphisphjTa, *317. 

 Amphorina, 335. 

 AnipuUna, 236. 

 Ampullaccra, 259. 

 AmpuUaria, 14, 27, 32, 



*25S. 

 Ampidtina, 310. 

 Amusium, 411. 

 Amusiima, *412. 

 Anadenus, *296. 

 Analogies, 45. 

 Anapa, *485. 

 Anastoma, *289. 

 Anatina, *495. 

 Anatina, 431. 

 Anatinella, *479. 

 Anatinidse, *494. 

 Anatomus, 269. 

 AnciUaria, 24, *227. 

 Ancistrochirus, 171. 

 'Ancistroteuthis, 171. 

 Ancula, 327, *331. 



AnculotuH, 247. 

 Ancj'locei'as, *200. 

 Ancylus, 287, *302. 

 Aneitea, *297. 

 Anisoceras, 200. 

 Annulati, *199. 

 Annulosa, 2. 

 Anodon, 30, *434. 

 Anolax, *220. 

 Anomalocardia, 424, 473, 

 Anomia, 19, *408. 

 Anoplomya, 496. 

 Anoplotheca, *379. 

 Anops, 342. 

 Anthracosia, *470. 

 Antigone, 473. 

 Antilles, shells of, 110. 

 Antiopa, *337. 

 Aperostoma, 308. 

 Aperture, 206. 

 Apex, 205. 

 Apioceras, 193. 

 Aphxa, 302. 

 Apioceras, 194. 

 Aplustrum, *318. 

 Aplysia, 11, 22, 23, 24,*320. 

 Aplysia, 321. 

 Aplysiadee, *320. 

 Apon-haVs, 211, »244. 

 Aptychus, 182. 

 Aquiferous sj^stem, 24. 

 Arabian shells, 98. 

 Aralo-Caspian prov., 68. 

 Area, 30, 395, *424. 

 Arcadee, *424. 

 Architectoma, 253. 

 Arcinella, 437, 471, 502. 

 Ar corny a, 497. 

 Arcfica, 464. 

 Arctic province, 67 — 59. 

 Areopagia, 480. 

 Argentine region, 114. 

 Argiope, *368. 

 Argonauta, 28, 31, 39, 56, 



*161. 

 Argiis, 411. 

 Arietes, *198. 

 Arion, *296. 

 Ariophanta, *290. 

 Armati, *198. 

 Artemis, *474. 

 Articulated operc, 208. 



