INDEX OF SPECIES. 



Artemis 



gigantea, 60, 352. 



Pacifica, 278. 



ponderosa, 60, 289, P 60. 



saccata, 201, 227, 246, 278, 

 P 62, S 161, U 201. 



simplex, 186, 246, 278, 

 287, P 61. 



subquadrata, 186, P 62. 



tennis, 281. 

 ?Assiminea 



dubiosa, 275. 



subrotundata, 114, 142, 241. 

 Astarte 



Banksii, 178. 



borealis, 219. 



cornpacta, 88, 128, 168. 



coinpressa, 88, 128, 223, P 162. 



corbis, 236. 



corrugata, 219, 223, 306, 



0347- 



crassidens, 175, 347. 



Danmoniensis, 223. 



Esquimalti, 128. 



fluctuata, 97, 128. 



Garensis, 221. 



lactea, 20, 71, 72, 175, O 219, 

 O 221, 347. 



Omalii, 128. 



oniaria, 97. 



orbicularis, 128, 236. 



Scotica, 20, 219, 221, 223. 



semisulcata, 219, 221, 347. 



fstriata, O 178. 



triangularis, 336. 

 Asteronotus 



alabastrina, 94. 



sanguinea, 94. 

 Asthenothaerus 



villosior, 104, 209. 

 ?Atys 



casta, 104, 212. 

 Aulus 



grandis, 12. 

 Auricula 



acuta, 275. 



Auricula 



concinna, 275. 

 infrequens, 275. 

 Panauiensis, 275. 

 papillifera, 275. 

 stagnalis, 275. 

 Tabogensis, 275. 

 trilineata, 275. 

 Autonoe 



rubra, P 108. 

 Avicula 



Atlantica, O 227, 236, 249, 



364, P 148, P 538. 

 barbata, 50. 

 Cumingii, 50. 

 fimbriata, 296, P 550. 

 heteroptera, 50. 

 libela, 31, 199. 

 margaritifera, 277, 295. 

 Peruviana, 107, 153. 

 sterna, 24, 50, 199, O I, 227, 



229, 233, 249, O 277, 



3 6 4 , P 148, P 15 1, U 203. 

 Axiiiae a 



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

 insequalis, 154. 

 intermedia, 82, 97, 130, 170. 

 gigantea, 107. 

 multicosta, 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. 



aviculoides, 24. 



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

 152. 



illota, 24, 107, 200. 



mutabilis, 155. 



pernoides, 102. 



Reeviana, 27, 107, 200. 



