INDEX OF GENERA AND SPECIES. 



293 



PhyUonotus, 43, 69. 



paucivaricatus, 43, 49. 

 PINNA, 195, 247, 268. 



Brewerii, 195, 247, 268. 



indet, 268. 

 PISANIA, 71. 



fortis, 71. 

 Plagiostoma, 60, 104. 



annulata, 60, 104. 



Pedroana, 60, 104. 



truncata, 60, 104. 

 Plectosolen, 89, 116, 176, 233. 



curtus, 116. 



Diegoensis, 176, 233. 



parallelus, 233. 



protexta, 89. 

 PLEUROMYA, 178, 235. 



papyracea, 178, 235. 

 PLEUROTOMA, 5, 47, 112. 



Carpenter iana, 5, 72 



inermis, 72. 



perversa, 6, 73. 



transmontana, 112. 



Tryoniana, 6, 47, 72. 

 Voyi, 7, 73. 

 PLICATULA, 252. 



variata, 252. 

 Polyplex, 70. 



gracilis, 70. 

 POMAULAX, 83. 



undosus, 83. 

 POTAMIDES, 227. 



diadema, 227. 



tenuis, 227. 

 Potamis, 79. 



pullatus, 79. 

 Priene, 73. 



Priene Oregonensis, 73. 

 PRISCOFUSUS, 71, 112. 



corpulentus, 112. 



devinctus, 112. 



geniculus, 71. 



medialis, 112. 



nodiferus, 112. 



Oregonensis, 112. 

 Protocardium, 187, 242, 267. 



grajiuliferum, 267. 



PlacerensiSj 242. 



translucidum, 187, 242. 

 Psammocola, 21, 92. 



alata, 21, 92. 

 PSEPHIS, 96. 



Lordii, 96. 



tantillus, 96. 

 PSEUDOCARDIUM, 20, 55, 92. 



Gabbii, 21, 92. 



PSEUDOLIVA, 219. 



lineata, 219. 



volutseformis, 220. 

 PTERONOTUS, 70. 



festivus, 70. 

 PTILOTEUTHIS, 128, 209. 



foliatus, 128, 209. 

 PTTCHOCERAS, 142, 143, 214. 



cequicostatus, 142, 214. 



Dupinianum, 143. 



Forbesianum, 143, 144. 

 PTYCHOSTYLIS, 16, 84. 



caflFoa, 16, 84. 

 PUGNELLUS, 162, 225. 



contortus, 163. 



hamulus, 162, 225. 



manubriatus, 163, 225. 

 PURPURA, 75, 112. 



