NOETHWEST COAST MARINE SHELLBEARING MOIA.USKS. 
()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 i’uget Sound. 
ACTEOCINA EXIMIA Baird, 1863. 
Proc Zool. Soc., p. G7. 
Kodiak Island, Alaska, south to Puget Sound. 
ACTEOCINA SMIRNA Dali, 1919. 
Proe. U. S. Nat. Mus., vol. 5G, No. 2295, p. 29G. 
San Diego, California, to San Salvador. 
ACTEOCINA INCULTA Gould, 1856. 
Proc. Zool. Soc., p. 203; ^lan. Conch., vol. 15, pi. 59, fig. 15. 
Monterey, California, to Gulf of California. 
ACTEOCINA INFREQUENS C. B. Adams, 1852. ^ 
Panama Shells, p. 214. C . 6k/. 
Santa Monica, California, to Panama. ^ 
/s 
ACTEOCINA CARINATA Carpenter, 1857. 
Mazatian Cat., p. 171. * v /O 
San Diego, California, to Gulf of California. ^ 
ACTEOCINA PLANATA Carpenter, 1863. 
Journ. de Conchyl., vol. 13, p. 139. 
San Diego, Caiifornia. 
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. IG. fig. 3. 
Arctic Ocean; Bering Sea (Krause). Also Atlantic. 
Section COLEOPHYSIS Fischer, 1883. 
RETUSA HARPA Dali, 1871. 
Amer. Journ. Conch., vol. 7, p. 186, pi. 15, fig. 11. 14/^ 
Queen Charlotte Islands, British Columbia, to San Diego, California. 
Section STJLCULAEIA Dali, ld2jl. 
RETUSA XYSTRUM Dali, 1919. 
. Proc. U. S. Nat. Mus., vol. 56, No. 2295, p. 297. 
San Pedro to San Diego, California. 
167980— 21— Bull. 112 5 
