112 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
NUCELLA LAMELLOSA FRANCISCANA Dali, 1915. 
Proc. U. S. Nat. Mus., vol. 49, p. 565, pi. 74, fig. 6. 
San Francisco Bay, California. 
NUCELLA LAMELLOSA HORMICA Dali, 1915. 
Proc. U. S. Nat. Mns., vol. 49, p. 565, pi. 74, fig. 8. 
Inner Harbor of Sitka, Alaska. 
NUCELLA LAMELLOSA NEPTUNEA Dali, 1915. . ^ ^ 
Proc. U. S. Nat. Mus., vol. 49, p. 565. ^ 
Cook’s Inlet, Alaska. 
NUCELLA LAMELLOSA CYMICA Dali, 1915. 
Proc. U. S. Nat. Mus., vol. 49, p. 565, pi. 74, fig. 5. 
Surf-beaten rocks, coast of Washington. 
NUCELLA LAMELLOSA SITKANA Dall, 1915. 
Proc. U. S. Nat. IMiis., vol. 49, p. 566, pi. 74, fig. 4. 
Inner Harbor, Sitka, Alaska. 
NUCELLA LIMA Martyn, 1784. 
111. Nondescript Shells, table 2, pi. 46 ; Proc. U. S. Nat. Mus., vol. 49, pi. 75, 
figs. 4-6, 1915. 
Kotzebue Sound, Arctic Ocean, south on the west to Bering Island, the Kuril 
Islands and Northern .Tapan, on the east to the Aleutian Islands, Alaska, 
Monterey, and San Diego, California, and Cerros Island, Lower California. 
NUCELLA CANALICULATA Dados, 1832. 
Ann. Sci. Nat., vol. 26, p. 104, pi. 1, fig. 1. 
The whole Aleutian chain, eastward to Sitka and southward to Monterey. 
NUCELLA CANALICULATA ANALOGA Forbes, 1850. 
Proc. Zool. Soc., p. 273, pi. 11, fig. 12. 
California. (Forbes.) 
NUCELLA CANALICULATA COMPRESSA Dali, 1915. 
Proc. U. S. Nat. Mus., vol. 49, p. 569, pi. 74, fig. 2. 
Monterey, California. 
NUCELLA EMARGINATA Deshayes, 1839. 
Bevue Zool. Soc. Cuv., p. 360. — GukaiN, Mag. de Zool., 1841, pi. 25. 
Bering Island and the Okhotsk Sea on the west; on the east from Hag- 
meister Island, Bering Sea, and southward to California, Mazatlan, and 
Topolobampo, Mexico. 
NUCELLA EMARGINATA OSTRINA Gould, 1852. 
Kept. U. S. Expl. Exp., Moll., p. 244, pi. 18, figs. 310 <J-&. 
Tillamook, Oregon. 
NUCELLA EMARGINATA PROJECTA Dall, 1915. 
Proc. U. S. Nat. Mus., vol. 4^, p. 571, pi. 75, fig. 3. 
Sitka, Alaska. 
Genus ACANTHINA Fischer, 1807. 
Subgenus Acanthinucella Cooke, 1918. 
ACANTHINUCELLA SPIRATA Blainville, 1832. 
Nouv. Ann. du Mus. Paris, vol. 1, p. 252, pi. 12, fig. 8. 
Puget Sound to San Diego, California, and Socorro Island. 
