32 



2385 



2386 



2387 



2388 



2389 



2390 



2391 



2392 



2393 



2394 



2395 



3407 



963 



964 



1252 



2698 



2053 



2054 



1968 



1969 



1970 



1971 



1973 



1974 



2002 



1586 



1248 



965 



2463 



284 



1453 



1186 



1452 



1185 



2175 



2176 



2177 



2178 



2179 



2180 



2181 



2182 



2323 



274 



2756 



1205 



2738 



966 



967 



968 



969 



1204 



1588 



1484 



1479 



1485 



1483 



1482 



1480 



1481 



Ostrea fisheri Dall. 

 Ostrea veatchii Gabb, 1866. 

 Ostrea cumingiana Dunker. 

 Variety Mexicana Sby. 

 Ostrea palmula Cpr. 

 Ostrea serra Dall. 

 Ostrea columbiensis Hanley. 

 Ostrea elongata Solander. 1786. 

 Ostrea chilensis Philippi. 

 Ostrea multistriata Hanley. 184b. 

 Ostrea tubulifera Dall. 

 Ovula Vidleri Sby. 1881. 

 Ovulum barbarense Dall. 

 Ovulum formicarium Sowerby. 

 Pachypoma insequale Martyn. 

 Pachypoma insequale splratum 

 Pachypoma magdalena 

 Pachypoma lithophorum 



Genus Paludestrina Ofb. 

 Paludestrina longinqua 

 Paludestrina imitator Pilsbry. 

 Paludestrina Stearnsiana 

 Paludestrina Hemphilli 

 Paludestrina protea 

 Paludestrina Seemanni 

 Paludina Japonica Mart. 

 Paludinella castanea Cpr. 

 Paludinella newcombiana Hemphill. 



Pandora bicarinata Cpr. 

 Pandora (Clidiophora) punctata Cpr 



Panomya ampla Dall. 



Panopsea generosa Gould. 



Panopea globosa Dall. 



Panopaea novegica Spengler. 



Paphia grata 



Paphia staminea 



Variety petiti Desh. 1839. 



Variety laciniata Cpr. 1864. 



Variety ruderata Deshayes. 1853. 



Variety orbella Cpr. 1864. 



Variety sulculosa Dall. 1892. 



Paphia (Callithaca) tenerrima 



Paradione squalida Sby. 

 Parapholas californica Conr 



Parthenla quinquecincta Cpr. 



Patula asterisca 



Patula Chiricahuana Ashmuni 

 Patula horni Gabb. 

 Patula idahoensis Newcomb. 

 Patula pauper Gould. 

 Patula solitaria Say. 



Patula striatella 



Patula strigosa Gould. 

 Variety albida. Near Logan, Utah. 

 Variety carnea. Near Salt Lake, Utah. 

 Variety fragilis. Near Franklin, Idaho. 

 Variety hybrida. Near Logan, Utah. 

 Variety parma. Near Spokane Falls, Wash. 

 Variety picta. Rathdrum, Idaho. 

 Variety rugosa. New Brigham City, Utah. 



