20 



INDEX OF SPECIES. 



Artemis 



gigaiitea, 60, 352. 



Pacifioa, 278. 



ponderosa, 60, 289, P 60. 



sacoata, 201, 227, 246, 278, 

 P 62, S 161, U 201. 



simplex, 186, 246, 278, 

 287, P61. 



snbqnaflrata, i85, P 62. 



tenuis, 281, 

 ?Assiminea 



dubiosa, 275. 



subrotuudata, 1 14, 142, 241. 

 Astarte 



Banksii, 178. 



borealis, 219. 



compacta, 88, 128, i68. 



compressa, 88, 128, 223,? 162. 



corbis, 236. 



corrugata, 219, 223, 306, 



347- 



crassidens, 175, 347. 



Danraoniensis, 223. 



Esquimaiti, 128. 



fluctnata, 97, 128. 



Garensis, O 221. 



laotea, 20, 71, 72, 175, 219, 

 221, 347. 



Omalii, 128. 



omai'ia, 97. 



orbicularis, 128, 236. 



Scotica, 20, 219, 221, O 223. 



semisulcata, 219,0221,0347. 



?striata, 178. 



triangularis, 336. 

 Asteronotus 



alabastrina, 94. 



sanguinea, 94. 

 Asthenothsrus 



villosior, 104, 209. 

 ?Atys 



casta, 104, 212. 

 Aulus 



grandis, 12. 

 Auiicnla 



acuta, 275. 



Auricula 



coucinna, 275. 



infrequens, O 275. 



Panameusis, O 275. 



papillifera, O 275. 



stagnalis, 275. 



Tabogensis, 275. 



triliueata, 275. 

 Autonoe 



rubra, P 108. 

 Avicula 



Atlantica, 227, 236, 249, 

 364, P 148, P 538. 



barbata, 50. 



Curaingii, 50- 



fimbriata, 296, P 550. 



heteroptera, 50. 



libela, 31, 199. 



margaritifera, 277, 295. 



Peruviana, 107, 153. 



sterna, 24, 50, 199, i, 227, 

 O 229, 233, 249, O 277, 

 O364, Pi48,Pisi, U203. 

 Azinsea 



Barbarensis, 80, 82,97, 130, 170. 



insequalis, 154. 



intermedia, 82, 97, 130, 170. 



gigantea, 107. 



multioosta, 154, 155. 



parcipicta, 154. 



pectenoides, 154. 



septentrionalis, var. subobso- 

 leta, 113, 130,237. 



Bankivia 



varians, 253, 320, 365, 

 P 226. 

 Barbatia 



alternata, 24, 31, 200, 256. 



aviouloides, 24. 



gradata, 24, 69, 97, 107, 130, 



152. 

 illota, 24, 107, 200. 

 mutabilis, 155. 

 pernoides, 102. 

 Reeviana, 27, 107, 200. 



