46 



INDEX OF SPECIES. 



Cyrena 



Mexicana, 27, 164, I, 175, 



248, 281, 308, P 115. 

 Mexicana, var* 227, O 232. 



altilis, U 202. 



olivacea, 27, 164, 248, 281, 

 O 308, P 114, P 116. 



Panamensis, 164. 



placens, P 114. 



pullastra, 164. 

 radiata, 164. 



Recluzii, 164. 



solida, 60, 164, 281, 309. 



sordida, 164. 



subquadrata, 164, 287, 309. 



triaugula, 164. 



tumida, 164. 



varians, 164, P 115. 

 Cyrenoida 



serricata, P 104. 

 Cyrtopleura 



truucata, 121. 

 Cyrtulus 



distortus, 231. 



patulus, P 501. 

 Cytherea 



aequilatera, 203, 246, P 549. 



affinis, 201, 185, 191,0 229, 

 247, 278, P 69. 



alternata, 247, 289, P 69. 



argentina, 185, 236, P 539. 



arguta, 60. 



aurantia, 174, 229, 278. 



aurantiaca, 47, 201, 246, 

 278, P 63. 



biradiata, 9, 211, 236, 

 246, 366, P 64. 



brevispina, 281. 



brevispinosa, 289, P 69. 



callosa, 12, 279, 197, V 216. 



casta, P 70. 



castanea, P 70. 



chione, 211, 289, P 64. 



chionsea, 236, P 64, P 539. 



circinata, 289, P 69. 



concinna, O 185, P 69. 



Cytherea 



consanguiuea, 58, 201, 278. 

 corbicula, 246, P 54, P 55, 



P539- 



crassatelloides, 58,0 196,0 207, 

 P 58, V 216. 



Dariena, So. 



decisa, 77. 



Dione, var. 61, 185, 246, 

 285, P 67. 



Dunkeri, 60. 



elegans, 246, P 64. 



erycinoides, V 216. 



formosa, P 70. 



fusca, P 70. 



gigantea, 39, 60, 246, 289, 

 P 60. 



gracilior, 58, 246, P 55. 



graphica, P 70. 



Guineensis, P 69. 



Hindsii, 246, P 55. 



impudica, P 70. 



intermedia, 246, 289, P 55. 



laeta, 58. 



lepida, 246. 



ligula, 58. 



lupinaria, 6, 185, 229, 



284, P 67. 

 lusoria, P 70. 

 lutea, 58. 

 mactroides, 60, 246, P 55, P 



59- 



meretrix, 58, P 70. 

 niorphina, P 70. 

 nitidula, 58. 

 nobilis, 12, 106, 280. 

 ovum, P 70. 



Pacifica, 60, 246, P 55. 

 petechialis, 69, 202, O 247, 

 O 305- 366, P 70. 



lanulata, 47, 176,0 189, P59. 

 punctata, P 97. 

 radiata, 58, 201, 191, 278. 

 rosea, 175. 



semifulva, 236, O 246, P 55, 

 P539- 



