191 



2937 Pristiloma Idahoensis 



Pilsbry, 1. c. 1902:93? Idaho. 



2938 Cardita Grayi Dall. 1902. 



Gulf of Cal. — Panama. — Galapagos Islands. 



2939 Cardita laticostata Sby. 1832 (not Push. 1837). 

 Guaymas, Son. — Panama. — Guayaquil. 



2940 Cardita affinis Sby. 1932. 



Margarita bay, Baja Cal. — Gulf of Cal. — Panama. 



2941 Cardita sulcosa Dall. Panama. 



2942 Venericardia crassicostata Sby. 1825. 

 Gulf of Cal. — Galapagos Islands. 



2943 V: (ventricosa var?) Gouldii Dall. 



Type locality: — off San Diego, Cal., in 822 fms. 



"Shell ovate, subcompressed, with 23 ribs, sculpture similar to 

 that of V. ventricosa but feebler, with concentric ridges only in 

 front of the low beaks, and the color paler, the lunule much 

 smaller, and the lunular cardinals thin and feeble." — Dall, Phila 

 acad pr 1902:709. 



2944 Venericardia Stearnsi Dall. 



Type locality: — Puget Sound, with V. ventricosa. 



"Shell short, plump, strong, with very high prosogyrate beaks 

 and about 19 strong, rudely nodulous radial ribs with narrower 

 interspaces and a dark-brown pilose periostracum." — Dall, 1. c. 



2945 Venericardia monilicosta Gabb? 1861. 

 Pleistocene, Santa Barbara, Cal. (Jewett). 



2946 Venericardia incisa Dall, 1902. 

 Aleutian region. 



2946 Venericardia Alaskana Dall. 



Arctic ocean. — Bering Sea. — Japan. This species is that 

 which from the Pacific has usually been named V. borealis Conrad 

 — a species not known to occur within several thousand miles of 

 the habitat named, according to Dall. 



2947 Venericardia rudis Gray. 

 Aleutian Islands. 



2948 Venricardia prolongatus Cpr. 



A small, elevated shell, of pale gray color, and very much the 

 sculpture of V: incisa; beaks prominent, form oblique. Middleton 

 Island, Alaska, to Neeah bay. 



o 



2949 Dall, W. H. 



Synopsis of the Carditacea and of the American species. Phila 

 acad pr 1902:696-716. Above notes are taken from this paper. 



2950 Cockerell, T. D. A.: 



Variation in the snail-genus Ashmunella. Phila acad pr 1903: 

 615. 



2951 Genus Zacoleus Pilsbry. 



"Ariolimachinse with the penis a simple sac continued beyond 

 the insertion of the vas deferens; duct of the spermatheca enor- 

 mously enlarged; marginal teeth with very long zonitoid meso- 

 cones, no ectocones; intestine but slightly twisted; sole tripartite; 

 pneumostome behind the posterior 3d of the mantle; no caudal 



