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71 
- 21:1159 Oreohelix idahoensis Newcomb.. Idaho. 
— 21:1160 Oreohelix gouldi. 
21:1161 Oreohelix multicostata . 
The above names are mentioned in Keep’s work, chiefly as 
varieties, and will add to previous lists published. 
21:1162 Oscilla A. Ad., is sec. of Odostomia, | 
21:1163 Ostrea elongata virginica Gmelin, 1792. 
Imported from the Atlantic coast; the common market oyster, 
21:1164 Ostrea expansa Cpr. 
A form of lurida, nearly circular, attached by the whole sur- 
face of the lower valve to rocks or shells. Common on ocean 
shores of Southern California. 
21:1165 Ostrea rufoides Cpr. . 
Another rather distinct var. of lurida, with reddish shells 
when fresh, somewhat oblong in shape, common in San Diego 
bay, Cal. 
91:1166 Ovunla deflexa Sby. 
21:1167 Ovula defiexa barbarensis Dali. 
Aperture very long, outer lip thickened, spire concealed, 
sculpturing microscopic; color pink; about 20 mm long. Mon-~ 
terey to Santa Barbara, Cal. 
21:1168 Ovula variabilis C. B. Adams, 
This is a tropical species, rarely found in California, very 
- variable in color from white to red and deep purple. It is listed 
more generally under the name Radius variabilis; the generic 
name is given as Ovulum by Tryon and other authors, 
91:1169 Pachydesma crassatelloides Conrad, 1837, is Tivela 
Stultorum. 
21:1170 Genus Pandora Hwass, 1795. 
91:1171 Pandora (Kennerlyia) grandis Dall, 1877. (845). 
Pribiloff Islands. Bering Sea, to Siletz Bay, Oregon. 
91:1172 Pandora (Kennerlyia) glacialis Leach, 1819. 
Arctic Ocean to Straits of Fuca; Atlantic. 
21:1173 Pandora (Kennerlyia) glacialis entaeria Dall, 1915. 
21:1174 Pandora (Kennerlyia) filosa Carpenter, 1864. (844). 
; Nunivak Island. Bering Sea, to San Pedro, Cal. 
21:1175 Pandora (Kennerlyia) bilirata Conrad, 1855. 
Forrester Island, Alaska, to Point Abreojos, Baja Cal. 
21:1176 Pandora (Kennerlyia) granulata Dall, 1915. 
Santa Barbara, Cal., to Gulf of Cal. 
21:1177 Pandora (Heteroclidas) punctatus Conrad, 1837 (non 
Cpr. 1864). 
Vancouver Island to Gulf of Cal. 
91:1178 Pandora (Kennerlyia) bicarinata Cpr. (843). 
91:1179 Pachypoma inaequale Mart., is Astrea 
21:1180 ?Pandora bilirata Conr., is bicarinata. 
