46 



INDEX OF SPECIES. 



Cyrena 



Mexicaua, 27, 164, O i, 175, 

 0248,0281,0308, P 115. 



Muxicaua, vur. O 227, O 232. 



altilis, U 202. 



olivacea, 27, 164, 248, "O 281, 

 30S, P 114, P 1 16, 



Panainendi:^, 164. 



placens, P 114. 



pullastra, 164, 



radiata, 164. 



Recluzii, 164. 



solida, 60, 164, 281, O 309. 



sordida, 164. 



subquadiata, 164, 287, 309. 



triangula, 164. 



tumida, 164. 



vai; lis, 164, P 115. 

 Cyrenoida 



seirifata, P 104. 

 Cyrtopleura 



truuL-ata, 121. 

 Cyrtulus 



distortus, 231. 



patulus, P 501. 

 Cytherea 



aHjuilatera, 203, 246, P 549, 



affinis, 201, O 1S5, O 191,0 229, 

 O 247, 278, P 69. 



alternata, 247, O 2S9, P 69. 



argeutiua, 185, O 236, P 539. 



arguta, 60. 



aurantia, 174, 229, 278. 



a rantiaca, 47, 201, 246, 

 278, P 63. 



biradiata, 9, 211, 236, 

 246, 366, P 64. 



brevispina, O 281. 



brevispiiiosa, O 289, P 69. 



callosa, r2, 279, 197, V 216, 



casta, P 70. 



castanea, P 70. 



chione, O 2ir, 2S9, P 64. 



chionsea, O 236, P 64, P 539. 



circiriata, O 289, P 69. 



concinna, O 185, P 69. 



Cytherea 



consauguima, 5S, 201, O 278. 

 corbiuula, O 246, P 54, P 55, 



P539. 

 crassatelloides, 58,0 196,0 207, 



P 58, V 216. 

 Darieiia, 80. 

 deci.sa, 77. 

 Dioue, iv(r. 61, 1S5, O 246, 



O 2S5, P 67. 

 Dunkuri, 60. 

 elegaus, O 246, P 64. 

 erycinoides, V 216. 

 forinosa, P 70. 

 fusca, P 70. 

 gigaiitea, 39, 60, 246, 2S9, 



P 60. 

 gracilior, 58, 246, P 55. 

 graphiua, P 70. 

 (lUineeusis, P 69. 

 Iliiidsii, 246, P 55. 

 impudiea, P 70. 



iuterniiilia, 246, 289, P 55. 

 IsBta, 58. 

 lepida, 246. 

 lijula, 58. 

 lupiuaria, 6, 1S5, 229, 



2S4, P 67. 

 Insoria, P 70. 

 lutfiv, 5S. 

 m ictroides, 60, O 246, P 55, P 



59. 

 meretrix, 58, P 70. 

 morphiua, P 70. 

 uitidnla, 58. 

 nobilis, 12, 106, 280. 

 oviiin, P 70. 



Pacifica, 60, O 246, P 55. 

 peteuhialis, 69, O 202, 247, 



O 305, O 366, P 70. 

 lanulata, 47, 1 76, 189, P 59. 

 punctata, P 97. 

 radiata, 58, 201, O 191, 278. 

 rosea, 175. 

 semifulva, 236, O 246, P 55, 



PS39. 



