46 



INDEX OF SPECIES. 



Cyrena 



Mexicana, 27, 164, i, 175, 

 O248, O281, O30S, P 115. 



Mexicana, var. 227, 232. 



altilis, U 202. 



olivacea, 27, 164, 248, 281, 

 308, P 114, P "6. 



Panameiisis, 164- 



plaoens, P 114. 



piiUastra, 164. 



radiata, 164. 



Reuluzii, 164. 



solida, 60, 164, O 2S1, 309. 



sordida, 164. 



sabquadrata, 164, 287, 309. 



triaiigula, 164, 



tumida, 164. 



varians, 164, P 115. 

 Cyrenoida 



serricata, P 104, 

 Cyrtopleura 



truncata, 121, 

 Cyrtulus 



distoi'tus, 231. 



patulus, P 501. 

 Cytherea 



sequilatera, 203, 246, P 549. 



affinis, 201, 185, 191,0 229, 

 247, 278, P 69. 



alternata, 247, 289, P 69. 



argentiiia, 185, 236, P 539. 



arguta, 60. 



aurantia, 174, O 229, 278. 



aurantiaca, 47, 201, 246, 

 278, P 63. 



biradiata, 9, 211, 236, 

 246, 366, P 64. 



brevispina, 281. 



brevispiiiosa, 289, P 69. 



oallosa, 12, 279, 197, V 216. 



casta, P 70. 



castanea, P 70. 



chione, 211, 289, P 64. 



cbioniea, 236, P 64, P 539. 



cireinata, 289, P 6g. 



conciniia, O 185, P 69. 



Cytherea 



consanguiiiea, 58, 201, 278. 

 corbiciila, 246, P 54, P 55, 



P 539- 

 crassatelloides, 58, 196, 207, 



P 58, V 216. 

 Dariena, 80. 

 decisa, 77. 

 Dioue, var. 61, 1S5, 246, 



285, P 67. 

 Dunkeri, 60. 

 elegans, 246, P 64. 

 erycinoides, V 2i6. 

 foimosa, P 70- 

 fusca, P 70. 

 gigaiitea, 39, 60, 246, 289, 



P 60. 

 gracilior, 58, 246, P 55. 

 graphica, P 70. 

 Guineeusis, P 69. 

 Hindsii, 246, P 55. 

 impudioa, P 70- 



intermedia, 246, 289, P 55. 

 laeta, 58. 

 lepida, 246. 

 ligula, 58. 

 lupinai-ia, 6, 185, 229, 



284, P 67. 

 lusoria, P 70. 

 latea, 58. 

 maotroides, 60, 246, P 55, P 



59- 

 meretrix, 58, P 70. 

 morpbiua, P 70. 

 Ditidula, 58. 

 nobilis, 12, io5, 280. 

 ovum, P 70. 



Paeifica, 60, 246, P 55. 

 petechialis, 69, 202, 247, 



O 305, 366, P 70. 

 lauulata, 47, 176,0 189, P 59. 

 punctata, P 97. 

 radiata, 58, 201, 191, 278. 

 rosea, 175. 

 semifulva, 236, 246, P 55, 



P539. 



