INDEX OF GENERA AND SPECIES. 



Acila, 102, 197, 250. 



Castrensis, 102. 



truncata, 197, 250. 

 Acm^ea, 51, 86, 172, 230. 



marmorea, 87. 



mamillata, 87. 



mitra, 87. 



patina, 52, 86. 



pelta, 52. 



persona, 52, 86. 



rudis, 51. 



scabra, 86. 



scurra, 87. 



spectrum, 52, 86. 



Tejonensis, 172, 230. 



Traskii, 173. 

 Acrosmilia, 253. 



striata, 253. 

 Action, 115, 232. , 



ellipticus, 115. 



iinpressus, 232. 

 Act^eonella, 173, 232. 



oviformis, 173, 232. 

 Act^eonina, 173, 231. 



Californica, 231. 



pupoides, 173, 231. 



Agasoma, 46. 



gravida, 46, 72. 



sinuata, 46, 72. 

 Akera, 88. 



culcitella, 88. 

 Alia, 10, 76. 



Bichthofeni, 10, 76. 

 Amauropsis, 223. 



alveata, 223. 



oviformis, 223. 

 Amiantis, 96. • 



callosa, 56, 96. 

 Ammonites, 130, 210, 258. 



Archiacianus, 136. 



Batesii, 132, 211. 



Brewerii, 130, 210. 



Chicoensis, 211. 



complexus, 133, 211. 



Cooperii, 212. 



fraternus, 137, 212. 



Haydeni, 210. 



Hoffmannii, 131, 137, 211. 



jugalis, 133, 212. 



Michelinianus, 136. 



Newberryanus, 210, 212. 



Pedernalis, 258. 



( 277 ) 



