NORTHWEST COAST MARINE SHELXJ3EARING MOLLUSKS. 169 



ACMAEA CASSIS NACELLOIDES Dall, 1871. 



Amer. Journ. Conch., vol. 6, p. 247, pi. 17, figs. 36 o-e. 



Attn Island, Aleutians, east and south to San Diego, California, on kelp. 



ACMAEA CASSIS MONTICOLA Carpenter. 18GG. 



Amer. Journ, Conch., vol. 2, p. 337. 

 Monterey, California. 



ACMAEA SCUTUM Eschscholtz, 1833. 



Zool. Atlas, pt. 5, p. 19, pi. 23, figs. 1-3. 



Southern Bering Sea to Tugur Bay and the Shantar Islands on the west, 

 and from the Pribilof and Aleutian Islands on the east south to the 

 Gulf of California and Socorro Island. 



ACMAEA SCUTUM PATINA Eschscholtz, 1833. 



Zool. Atlas, pt. 5, p. 19, pi. 24, figs. 7, 8. 

 Same distribution as the typical fonrr. 



ACMAEA SCUTUM PINTADINA Gould, 1846. 



Proc. Boston Soc. Nat. Hist., vol. 2, p. 151. — Tryon, Man., vol. 13, pi. 9, 



fig. 6. 

 Aleutian Islands to Monterey, California. 



ACMAEA SCUTUM CRIBRARIA Carpenter, 1866. 

 Amer. Journ. Conch., vol. 2, p. 335. 

 Neah Bay, Washington, to Santa Barbara, California. 



ACMAEA SCUTUM OCHRACEA Dall, 1871. 



Amer. Journ. Conch., vol 6. p. 249, pi. 17, fig. 35. 

 Monterey, California. 



ACMAEA SCUTUM PARALLELA Dall, 1914. 



Nautilus, vol. 2S, No. 2, p. 14; Amer. Journ., Conch., vol. 6, p. 250, pi. 14. 



fig. 13. 

 Sitka, Alaska, to Victoria, British Columbia, on eel grass. 



ACMAEA EMYDIA Dall, 1914. 



Nautilus, vol. 28, No. 2, p. 14 ; Amer. Journ. Conch., vol. 6, p. 250, ex parte. 

 Arctic Ocean and Northern Bering Sea to Nushagak, Alaska, the Pribilof 

 Islands, and Attu Island. 



ACMAEA PERAMABILIS Dall, 1872. 



rroc. Cal. Acad. Sci., vol. 4, p. 302.— Tryon, Man., vol. 13, -pi. 33, figs. 



80-82. 

 Shumagin Islands. Alaska, on granite rocks only. 



ACMAEA DIGITALIS Eschscholtz, 1833. 



Zool. Atlas, vol. 5, p. 20, pi. 23, figs. 7, 8. 

 Aleutian Islands to Monterey, California. 



ACMAEA DIGITALIS UMBONATA Reeve, 1855. 

 Conch. Icon., Patella, fig. 107. 

 Saginaw Bay, Alaska. 



ACMAEA DIGITALIS TEXTILIS Gould, 1846. 



Proc. Boston Soc. Nat. Hist., vol. 2, p. 152; Rep. U. S. Expl. Exp., Moll., 



pi. 29, fig. 456. 

 Tillamook, Oregon, south to Socorro Island. 



