104 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
ALIA GAUSAPATA Gould, 1850. 
Proc. Boston Soc. Nat. Hist., vol. 3, p. 170; Rep. U. S. Expl. Exp. Moll., 
pi. 19, fig. 337, 1852. 
Port Etches, Alaska, to San Diego, California. 
ALIA CARINATA Hinds. 1844. 
Zool. Voy. Sulphur, Moll., p. 39, pi. 10, figs. 15-16. 
San Francisco Bay to Cape San Lucas. 
ALIA CARINATA HINDSI (Gaskoin) Reeve, 1858. 
Conch. Icon. Columbella, fig. 143. 
Monterey to San Diego, California. 
ALIA CARINATA CALIFORNIANA Gaskoin, 1852. 
Proc. Zool. Soc., p. 12. — Arnold, I*al. San Pedro, pi. 10, fig. 9, 1903. 
Forrester Island, Alaska, to Salina Cruz, Mexico. 
ALIA CALLIMORPHA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, p. 330. 
San Diego, California, to Magdalena Bay, Lower California. 
ALIA CASCIANA Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, p. 300. 
La Jolla, San Diego County, California. 
Subgenus Astyris H. and A. Adams, 1853. 
ASTYRIS ROSACEA Gould, 1840. 
Amer. Journ. Sci., vol. 38, p. 197 ; Inv. Mass., p. 311, pi. 13, fig. 195, 1841. 
Icy Cape, Arctic Ocean, south to Peril Straits, Alaska. Circumboreal. 
ASTYRIS AMIANTIS Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 56, p. 331. 
Kyska Harbor, Aleutiaar Islands, Alaska. 
ASTYRIS PERMODESTA Dali, 1890. 
Proc. U. S. Nat. Mus., vol. 12, p. 327, pi. 5, fig. 4. 
Unalaska, Aleutian Islands, south to San Diego, California, in deep water. 
ASTYRIS AURANTIACA Dali, 1871. 
Amer. Journ. Conch., vol. 7, p. 115, pi. 15, fig. 13. 
Monterey, California, to Magdalena Bay, Lower California. 
ASTYRIS HYPODRA Dall, 1916. (Plate 6, fig. 10.> 
Nautilus, vol. 30, No. 3, p. 27 ; Proc. Cal. Acad. Sci., vol. 5, pi. 1, fig. 5. 
Puget Sound to Puerto Libertad, West Mexico. 
Genus NITIDELLA Swainson, 1840. 
NITIDELLA GOULDII Carpenter, 1857. 
Proc. Zool. Soc., p. 208. . ' 
Kodiak, Alaska, to San Diego, California. 
7NITIDELLA LUCULENTA Dall, 1919. 
Proc. U. S. Nat. Mus., vol. 56, p. 331. 
Fuca Strait to Coronado Islands. 
