NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 49 
SEMELE INCONGRUA Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 640 ; Proc. Cal. Acad. Sci., vol. 3, p. 208. 
Monterey, California, to the Coronado Islands. 
SEMELE PULCHRA Sowerby, 1832. 
Proc. Zool. Soc., p. 57 ; Conch. 111., Amphidesma, fig. 2. 
Monterey, California, to Ecuador. 
Genus CUMINGIA Sowerby, 1833. 
CUMINGIA LAMELLOSA Sowerby, 1833. 
Proc. Zool. Soc., p. 34 ; Concli. Icon., Cumingia, pi. 1, fig. 5. 
Crescent City, California, south to Payta, Peru. 
Family DONACIDAE. 
Genus DONAX Linnaeus, 1758. 
DONAX CALIFORNICA Conrad, 1837. 
Journ. Acad. Nat. Sci. Phila., vol. 7, p. 254, pi. 19, fig. 1. ^ a 
San Pedro, California, to Panama, ^ 
DONAX GOULDII Dali, 1919. 
Boston Journ. Nat. Hist., vol. 6, p. 394 (as olesiis), pi. 15, fig. 9. 
Santa Barbara, California, to Acapulco, 
DONAX PUNCTATOSTRIATA Hanley, 1843. 
Proc. Zool. Soc., p. 5 ; Thes. Conch., Donax, p. 310, figs. 49, 50. 
San Pedro, California, to Payta, Peru. 
DONAX CONRADI Deshayes, 1854. 
Proc. Zool. Soc., p. 351 ; Conch. Icon., Donax, pi. 5, fig. 29. 
San Diego, California, to Central xAmerica. 
Family PSAMMOBIIDAE. 
Genus PSAMMOBIA Lamarck, 1818. 
Subgenus Gobraeus Leach, 1852. 
GOBRAEUS REGULARIS Carpenter, 1864. 
Ann. Mag. Nat. Hist., ser. 3, vol. 13, p. 312. 
San Diego, California, to Cape San Lucas. 
GOBRAEUS CALIFORNICUS Conrad, 1848. 
Journ. Acad. Nat. Sci. Phila., vol. 7, pi. 19, fig. 3; Proc., vol. 4, p. 121. 
Japan, Kamchatka, the Aleutian Islands and south to San Diego, California. 
GOBRAEUS EDENTULUS Gabb, 1869. 
Pal. Cal., vol. 2, p. 53, pi. 15, fig. 11. 
San Pedro and Catalina Island, California, to San Diego. Also Pliocene 
of California. 
