CLASS PELECYPODA 
157 
posterior extremity direct; ligament margin nearly parallel with the base; 
color variegated with yellowish and brown angular spots; cardinal teeth 
compressed; sinus of pallial impression profound. Length, 1inches. 
(Conrad.) 
. Type in Phila. Acad. Sci. Type locality, California. 
Range. Commander and Aleutian Islands to Puget Sound and 
Socorro Island. Also Japan. In the Pleistocene at Santa Barbara and 
San Diego; in the Pliocene at Santa Rosa, Twelve Mile House in San 
Mateo County, Kirker’s Pass in Contra Costa County, San Fernando and 
San Diego; in the Miocene west of San Jose, Foxen, and in Santa Bar¬ 
bara County, California. 
Paphia staminea ruderata Deshayes, 1853. 
Cat. Conch. Brit. Mus., 1:136. Conch. Iconica, 14; pi. 25, fig. 130. 
Shell broadly obliquely ovate, dead-white, finely radiately ridged, ridges 
in pairs, concentrically plicated, plates very irregular, rudely lamellated 
on the posterior side, no lunule. (Conch. Iconica.) 
Type in Brit. Museum. Type locality, California. 
Range. Southern Bering Sea to Lobitas, California. 
Paphia staminea petitii Deshayes, 1839. 
Revue Zool. Soc. Cuvierienne, p. 359. Guerin Mag. de Zool. Moll., 1841, pi. 39. 
Yellowish, chalky white or dull gray color without maculations, sculp¬ 
ture markedly separated into areas. (Dali.) 
Type locality, Columbia River. 
Range. Aleutian Islands to San Quentin Bay, Lower California. 
Paphia staminea lacineata Carpenter, 1864. 
Snppl. Rep. Brit. Assoc., p. 641. Arnold, Pal. San Pedro; pi. 14, fig. 5. 
This extremely elegant variety is evenly reticulated by concentric and 
radial sculpture, and derives its individuality from the development of 
small prirkles or spines at each intersection. When these spines are worn 
off it cannot be separated from the variety petitii, but with them it is 
unmistakable. (Dali.) 
Type locality, Monterey or San Diego. 
Range. Unalaska to San Diego, California. In the Pleistocene at 
San Pedro, California. 
Paphia staminea orbella Carpenter, 1864. 
Plate 33, fig. 6. 
Snppl. Rep. Brit. Assoc., p. 641. Univ. Cal. Zool. Publ., 14; pi. 19, fig. 6. 
This variety comprises those specimens which have nestled in the 
borings of the large Pholas of the coast, especially at Monterey, and have 
