31 
13821 Odostomia (Evalea) tacomaensis 
951 Odostomia tenuisculpta Carpenter. 
1316 Odostomia (Evalea) tillamookensis 
1822 Odostomia (Evalea) valdezi 
292 Malina subdiaphana Cpr 
168 Olivella biplicata Sby 
169 Olivella beetica Cpr 
1666 Olivella gracilis Gaylordi 
2407 Olivella intorta Cpr. 
2051 Olivella (anazora Ducl. var.?) Porteri 
952 Ommastrephes giganteus Orbigny. See 2247. 
955 Ommastrephes robustus Dall. 
953 Ommastrephes sagittatus Lamarck. 
954 Ommastrephes tryoni Gabb. 
83 Omphalius aureotinctus 
220 Omphalius fuscescens Phil 
2101 Onchidella Binneyi 
956 Onchidella borealis Dall. 
957 Onchidella carpenteri 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 pygmza 
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 
185 Ostrea lurida Cpr. 
1145 Ostrea virginica Gmelin. 
2383 Ostrea iridescens Gray, 1854. 
2384 Ostrea megodon Hanley, 1845. 
