INDEX OF GENERA AND SPECIES. 



283 



CUMA, 9, 75. 



biplicata, 9, 75. 

 CUMINGIA, 94. 



Californica, 94. 

 CYCLAS, 100, 120. 



acutilineatus, 100. 



Estrellana, 120. 



fibrosa, 120. 



permacra, 120. 

 CYLICHNA, 115, 232. 



costata, 232. 



Oregona, 115. 



petrosa, 116. 

 CYLINDRITES, 232. 



brevis, 232. 

 CYMBOPHORA, 179, 236. 



Ashburnerii, 180, 236. 

 CYPHOSOMA, 276. 



Texanum, 276. 

 CYPR^A, 78, 163, 225. 



Bayerquei, 163, 225. 



Mathevvsonii, 164, 225. 



spadicoa, 78. 

 Cyprina, 99. 



bisecta, 99. 

 Cyprinella, 242. 



tennis, 212. 

 CYRENA. 26, 98. 



Californica, 98. 

 Cytherea, 95, 96, 118. 



callosa, 96. 



crassatelloid.es, 96. 



gigantea, 97. 



Oregona, 95. 



solidissima, 96. 



vespertina, 118. 

 Defrancia, 7. 



Delphinula, 264. 

 DENTALIUM, 86, 115, 230. 



Cooperii, 230. 



hexagon urn, 86. 



Nanaimoensis, 230. 



pusi/lum, 230. 



stramineum, 230. 



substriatum, 115. 

 Diadema, 276. 



Texana, 276. 

 Biadora, 115. 



crucibuliformis, 115. 

 DIODUS, 242. 



tenuis, 242. 

 Dione, 95, 118, 239, 241. 



angustifrons, 118. 



brevilineata, 95. 



Conradiana, 241. ' 



Oregona, 95. 



Uvasan-r, 239. 



varians. 239. 



vespertina, 118. 



DlPTYCHOCERAS, 143, 214. 



ItBvis, 144, 214. 

 DISCOHELIX, 224. 



Leana, 224. 

 Doliopsis, 113. 



biliratus, 113. 



petrosus, 113. 

 Dolium, 113. 



petrosum, 113. 

 DONAX, 89, 93, 183, 238. 



latus, 183, 238. 



protexta, 89. 



stultorum, 96. 

 DOSINIA, 24, 96, 97, 119, 240. 



alta, 25, 97, 240. 



