31 



1321 Odostomia (Evalea) taconiaensis 



951 Odostomia tenuisculpta Carpenter. 

 1316 Odostomia (Evalea) tillamookensis 



1322 Odostomia (Evalea) valdezi 

 292 CEdalina subdiaphana Cpr 



168 Olivella biplicata Sby 



169 Olivella boetica Cpr 



1666 Olivella gracilis Gaylordi 



2407 Olivella intorta Cpr. 



2051 Olivella (anazora Duel, var.?) Porteri 



952 Ommastrephes giganteus Orbigny. See 2247. 



955 Ommastrephes robustus Dall. 



953 Ommastrephes sagittatus Lamarck. 



954 Ommastrephes tryoni Gabb. 

 83 Omphalitis aureotinctus 



220 Omphalitis fuscescens Phil 

 2101 Onchidella Binneyi 



956 Onchidella borealis Dall. 



957 Onchidella carpenter! W. G. Binney. 

 1214 Onchidium carpenteri W. G. Binuey. 

 2057 Onoba asser 



3060 Onychoteuthis Banksii (Leach 1817) Ferussac. 

 1283 Onychoteuthis fusiformis Gabb. Puget Sound? (Kenner 

 ley). Victoria? 



958 Opalia borealis Gould. 

 421 Opalia bullata Carpenter. 

 193 Opalia crenatoides Cpr 



474 Opalia crenatoides insculpta Cooper. 



1467 Opalia (Dentiscala) Mazatlanica Dall. 



1468 Opalia (Dentiscala) Mexicana Dall. 



959 Opalia retiporosa Carpenter. 



960 Opalia spongiosa Carpenter. 

 1608 Orchidium Lesliei 



2955 Genus Oreohelix Pilsbry. 



2956 Oreohelix strigosa 



2957 Variety concentrata. Arizona. 



2958 Variety Huachucana. Arizona. 



2959 Variety Socorroensis. New Mexico. 

 2481 Oreohelix Clappi 



2490 Oreohelix strigosa metcalfei 

 2333 Orehelix haydeni betheli 

 2360 Oreohelix hendersoni dakani 



2369 Oreohelix yavapai extremitatis 



2370 Oreoheilx pygmaea 



2960 Oreohelix barbata 



2961 Oreohelix Yavapai 



2962 Variety Neomexicana. N. M. 



2963 Oreohelix Chiricahuana 

 2520 Oreohelix yavapai compactula 

 2257 Oreohelix carinifera 



2252 Oreohelix hendersoni 



962 Oscilla insculpta Carpenter. 



961 Ostrea amara Carpenter. 



386 Ostrea concaphila Carpenter 



387 Variety Rufoides Carpenter 

 135 Ostrea lurida Cpr. 



1145 Ostrea virginica Gmelin. 



2383 Ostrea iridescens Gray, 1854. 



2384 Ostrea megodon Hanley, 1845. 



