NORTHWEST COAST MARINE SHELLBEARING MOLUJSKS. () 1 



Family ACTEOCINIDAE. 



Genus ACTEOCINA Gray, 1847. 



ACTEOCINA CULCITELLA Gould, 1852. 



Boston Journ. Nat. Hist., vol. G, p. 377. pi. 14, fig. 8. 

 Kodiak Island, Alaska, south to Puget Sound. 



ACTEOCINA EXIMIA Baird. 1863. 



Proc Zool. Soc, p. U7. 



Kodiak Island, Alaska, south to Puget Sound. 



ACTEOCINA SMIRNA Dall, 1919. 



Proc, U. S. Nat. Mus., vol. 5G, No. 2295, p. 290. 

 Sun Diego, California, to San Salvador. 



ACTEOCINA INCULTA Gould, 1856. 



Proc. Zool. Soc, p. 203; Man. Conch., vol. 15, pi. 59, fig. 15. 

 Monterey, California, to Gulf of California. 



ACTEOCINA INFREQUENS C. B. Adams, 1852. 



Panama Shells, p. 214. 



Santa Monica, California, to Panama. 



ACTEOCINA CARINATA Carpenter, 1857. 

 Mazatlan Cat., p. 171. 

 Sun Diego, California, to Gulf of California. 



ACTEOCINA PLANATA Carpenter, 1865. 



Journ. de Conehyl., vol. 13, p. 139. 

 Sun Diego, California. 



Genus RETUSA Brown, 1827. 



RETUSA SEMEN Reeve, 1856. 



Last of the Arctic Voy., vol. 2, p. 393, pi. 32, fig. 4. 

 Off Point Collinson, Arctic Ocean. Also Atlantic. 



RETUSA OBTUSA Montagu, 1803. 



Test. Brit., vol. 1, p. 223, pi. 7, fig. 3. 



Arctic Ocean to St. Mathew Island. Circumboreal. 



RETUSA PERTENUIS Mighels, 1843. 



Boston Journ. Nat. Hist., vol. 4, p. 34G, pi. 1G. fig. 3. 

 Arctic Oceun; Bering Seu (Krause). Also Atlantic. 



Section COLEOPKYSIS Fischer, 1883. 



RETUSA HARPA DaH, 1871. 



Amer. Journ. Conch., vol. 7, p. 136, pi. 15, fig. 11. 



Queen Charlotte Islands, British Columbia, to San Diego, California. 



Section SULCTJLARIA Dall, 1920. 



RETUSA XYSTRUM Dall, 1919. 



Proc. U. S. Nat. Mus., vol. 56. No. 2295, p. 297. 

 San Pedro to San Diego, California. 



167980—21— Bull. 112 5 



