INDEX. 



359 



Arene, H. & A. Ad. II 

 Argina, Gra^y. . . Ill 

 Argiope, E. Desl. . Ill 

 Argobuccinuni, Klein. II 



Argoclerma, Poll. 

 Argonauta, Linn. 

 Argouantidffi. . . 

 Argus, Bohadscb. 

 Argus, Poli. . . 



Ill 



II 



II 



II 



III 



III 



II 



II 



II 



II 



III 



III 



Ariadna, Fischer. . 

 Aricia, Grra3^ . . 

 ArietiteSjWaagen. . 

 Arinia, H. & A. Ad. 

 Ariolimax, Morch. . 

 Avion, Ferussac. 



Arionidse Ill 



Arionta, Leach. . . Ill 

 Ariophanta, Desmoul. Ill 

 Ariuueulus, Lessona. Ill 

 Armeuica, Bottger. Ill 

 Armina, Raf. . . 

 Arnioceras, Hyatt. . 

 Arpadites, Mojs. . 

 Arrosoir, Lamarck. 

 Arrhoges, Gabb. 

 Artachsea, Bergh. . 

 Artemis, Poli. . . 

 Artemon,Beck. . . 

 Artenia, Conrad. . 

 Artbropomata. . . 

 Articulata, Humph. 

 Artburia, Carp. . 

 Arytsene, Gra3^ . . 

 Asa, Leach. . . . 

 Asaphis, Modeer. . 

 Ascoceras, Barrande 

 Asiphonida. , . . 



Asolene, d'Orb. . . 

 Aspa, H. & A. Ad. . 

 Aspergillinae. . . 

 Aspergillum, Lam. . 

 Aspidella, Billings. 

 Aspidoceras, Zittel. 

 Aspidoporus, Fitz. 



II 



II 



II 



III 



II 



II 



III 



III 



III 



III 



III 



II 



III 



III 



III 



11 



III 



III 



II 



II 



III 



III 



II 



II 



III 



PAGE 



299 

 255 

 313 

 126 



289 



22 



12 



369 



288 



289 



223 



198 



75 



283 



84 



83 



83 



41 



25 



84 



17 



392 



75 



70 



117 



193 



372 



180 



16 



178 



307 



307 



344 



118 



180 



166 



55 



117 



235 



276 



126 



117 



117 



93 



82 



83 



Assiminia, Leach. . 



II 



PAGE 



272 



Astarte, Sowb. . . 



III 



226 



Astartella, H. & W. 



III 



227 



Astartidse. . . . 



III 



226 



Astartinffi. . , . 



III 



226 



Asthenotbperus, Carp 



III 



144 



Astartila, Dana. . . 



III 



230 



Asteroceras, Hyatt. 



II 



75 



Asteronotus, Ehrenb 



II 



373 



Astraea, Bolten. . 



II 



307 



Astrsea, Hartmann. 



III 



56 



Astralium, Link. . 



II 



307 



Astyris, H. & A. Ad. 



II 



179 



Atagema, Grube. . 



II 



374 



Ataphrus, Gabb. 



II 



314 



Ataxus, Albers. 



III 



51 



Athleta, Conr. . . 



II 



166 



Athoracophorus, Gld 



III 



89 



Athyris, M'Coy. . 



III 



322 



Atilia,H. &A."Ad. . 



II 



178 



Atlanta, Lesueur . 



II 



350 



Atlantidae. . . . 



II 



350 



Atlas, Lesueur. . . 



II 



354 



Atoma, Bellardi. 



II 



184 



Atopa, Albers. . . 



III 



33 



Atractites, Link. , 



II 



47 



Atractus, Agassiz. . 



II 



137 



Atresius, Gabb. . . 



II 



245 



Atretia, Jeffreys. , 



III 



316 



Atrina, Gray. . . 



III 



283 



A try pa, Conr. . . 



III 



310 



Atr^'pa, Dalman. . 



III 



318 



Atrypidffi 



III 



318 



Atropis, Pease. . . 



II 



280 



Attica, Bottger. 



III 



75 



Aturia, Bronn. . . 



II 



59 



Atys, Montfort. . . 



II 



360 



Aucella, Ke3'serl. . 



III 



271 



Aulacoceras, Hauer. 



II 



52 



Aulacochiton, Shuttl 



. II 



344 



Aulacognatha. . . 



III 



19 



Aulacomya, Morch. 



III 



262 



Aulacostoma, Agassiz. II 



252 



Aulacothyris, Douy. 



III 



309 



Aulica, Gray. . . 



II 



164 



Aulocomya, Steinm. 



III 



274 



