INDEX. 
The synonyms are printed in zfalics, and the pages where the genera are described are 
Abbreviations, 49. 
Abra, 483. 
Abralia, 171. 
Acanthina, 223. 
Acanthochites, #284. 
Acanthodoris, #332. 
Acanthopleura, *283. 
Acanthoteuthis, *175. 
Acanthothyrts, 375. 
Acardo, 323, 454. 
Acavus, *289. 
Acephala, 5.- 
Acera, *316, 319. 
Achatina, *292. 
Achatinella, *292. 
Acicula, *310. 
Aciculide, *310. 
Aclesia, *321. 
Aclis, *240, 
Acmea, *281, 
Acmaea, 311. 
Acme, 311. 
Acceli, *174. 
Acosted, 435. 
Acroculia, 277. 
Acroloxus, 302. 
Acrotreta, *390. 
Acte@on, 313, 339. 
Acteonella, #314, 
Acteonia, *339. 
Acteonina, *314, 
Actinocamaz, 175. 
Actinoceras, *191. 
Actinoconchus, 373, 
Actinocyclus, *329. 
Actinodonta, 432. 
Acuarii, #174, 
Adamsiella, *308. 
Adductor impressions, 401. 
Adelopneumona, 285. 
Adeorbis, *266. 
Admete, 55, *216. 
gean Sea Shells, 67. |; 
, 027, *330, 
nigma, 408. 
ALolidee, *335. 
AEolis, 328, *335. 
stivation, 13, 
ZEtheria, *435, 
Affimities, 45. 
indicated by an asterisk (*). 
African region, 97. 
Aganides, 196. 
Agaronia, *227. 
Agina, 490. 
Alasmodon, 433. 
Alcadia, #310 
Aleynus, 265. 
Alderia, *338. 
Aleutian province, 76. 
Alexia, #305. 
Alicula, 316. 
Allorisma, 496, 498. 
Alvania, 240. 
Amalthea, *278. 
Amalthei, *198. 
Amathina, *277. 
Ambonyehia, *417. 
Amicula, 284. 
Ammonites, 35, 37, *197. 
Ammonitide, #195. 
Amnicola, *247. 
Amoura, 239. 
Amphibola, *259. 
Amphibulima, 290. 
Amphuiceras, 234, 
Amphicheena, *486. 
Amphidesma, 431, 483, 
497. 
Amphidonta, 407. 
Amphipeplea, *301. 
Amphisphyra, *317. 
Amphorina, 335. 
Ampulina, 236. 
Ampullacera, 259. 
Ampullaria, 14, 27, 32, 
#258. 
Ampultina, 310. 
Amusium, 411. 
Amusium, *412, 
Anadenus, *296, 
Analogies, 45. 
Anapa, *485. 
Anastoma, *289, 
Anatina, *495. 
Anatina, 431. 
‘Anatinella, *479. 
Anatinide, *494, 
Anatomus, 269. 
Ancillaria, 24, *227. 
‘Ancistrochirus, 171. 
‘Ancistroteuthis, 171. 
Ancula, 327, *331. 
| 
Anculotus, 247. 
Ancyloceras, *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. 
Apvuoceras, 193. 
Aplera, 302. 
Aploceras, 194. 
Aplustrum, *318. 
Aplysia, 11, 22, 23, 24,*320, 
Aplysia, 321. 
Aplysiade, *320. 
Aporrhais, 211, *244, 
Aptychus, 182. 
Aquiferous system, 24. 
Arabian shells, 98. 
Aralo-Caspian prov., 68. 
Arca, 30, 395, *424. 
Arcadee, *424. 
Architectoma, 253. 
Arcinella, 437, 471, 502. 
Arcomya, 497. 
Arctica, 464. 
Arctic province, 57—59. 
Areopagia, 480. 
Argentine region, 114. 
Argiope, *368. 
Argonauta, 28, 31, 39, 56, 
¥161. 
Argus, 411. 
Arietes, *198. 
Arion, *296, 
Ariophanta, *290. 
Armati, *198. 
Artemis, *474, 
Articulated operc., 208, 
