40 
BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
Subgenus Laevicardium Swainson, 1840. 
LAEVICARDIUM ELATUM Sowerby, 1833. 
Proc. Zool. Soc., p. 84; Conch. 111. Cardium, fig. 3. 
San Pedro, California, south to Panama. 
LAEVICARDIUM SUBSTRIATUM Conrad, 1837. 
Journ. Acad. Nat. Sci. Phila., vol. 7, p. 228, pi. 17, fig. 2. 
Catalina Island and San Pedro, California, to Acapulco. 
Genus SERRIPES Beck, 1841. 
SERRIPES GRONLANDICUS Gmelin, 1792. 
Syst. Nat, vol. 7, p. 3232; Binney’s Gould’s Inv. Mass., p. 145, fig. 454. 
Circumboreal. Arctic Seas and south to Hakodate, Japan, and Puget 
Sound. 
SERRIPES LAPEROUSII Deshayes, 1839. 
Rev. Zool. Soc. Cuvierienne, p. 360 . — Guerin, Mag. de Zool., Moll., pi. 48, 
1841. 
Bering Strait to Hakodate, Japan, and Sitka, Alaska. 
Genus PROTOCARDIA Beyrich, 1845. 
PROTOCARDIA CENTIFILOSA Carpenter. 1864. 
Suppl. Rep. Brit. Assoc., p. 642; Univ. Cal. Zool. Publ., vol. 14, pi. 20, 
fig. 2 a-d. 
Bodega Bay to Lower California. 
PROTOCARDIA CENTIFILOSA RICHARDSONII Whiteaves, 1878. (Plate 2, fig. 3.) 
Canadian Nat., ser. 2, vol. 8, p. 469. 
Queen Charlotte Islands to San Francisco. 
Family VESICOMYACIDAE. 
Genus VESICOMYA Dali, 1886. 
VESICOMYA OVALIS Dali, 1896. 
Proc. U. S. Nat. Mus., vol. 18, p. 18 ; Bull. Mus. Comp. Zool., vol. 43, p. 417. 
Clarence Strait, Alaska, 322 fathoms, and in Panama Bay, in 1,672 fathoms. 
VESICOMYA LEPTA Dali, 1896. 
Proc. U. S. Nat Mus., vol. 18, p. 17 ; Bull. Mus. Comp. Zool., vol. 43, p. 416, 
pi. 18, figs. 12, 14. 
Off Tillamook, Oregon, and south to the Gulf of California, in deep water. 
VESICOMYA STEARNSII Dali, 1895. (Plate 1, figs. 6, 7.) 
Proc. U. S. Nat. Mus., vol. 17, pp. 693, 696, fig. 1 A; vol. 18, p. 17. 
Off La Jolla, California, and south to the Gulf of California, in deep water 
Subgenus Archivesica Dali, 1908. 
ARCHIVESICA GIGAS Dali, 1896. 
Proc. U. S. Nat. Mus., vol. 18, p. 18 ; Bull. Mus. Comp. Zool., vol. 43, p. 418, 
pi. 16, fig. 9. 
Off Point Sur, California, and in the Gulf of California, in deep water. 
