46 
BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
Subgemis Oudaedia Monterosato, 1884. 
OUDARDIA BUTTONI Dali, 1900. 
Proc. U. S. Nat. Mus., vol. 23, p. 304, pi. 4, figs. 12, 13. 
Lituya Bay, Alaska, to the Gulf of California. 
Subgenus Peeonidia Dali, 1900. 
PERONIDIA BODEGENSIS Hinds, 1844. 
Voy. Sulphur, Zool., p. 67, pi. 21, fig. 2. 
Queen Charlotte Islands, British Columbia, to Gulf of California. Japan? 
PERONIDIA SANTAROSAE Dali, 1900. 
Proc. U. S. Nat. Mus., vol. 23, pp. 305, 321, pi. 3, fig. 6; pi. 4, figs. 1, 2. 
Santa Barbara Islands and San Diego, California. 
PERONIDIA LUTEA Gray, 1828. 
Index Test. Suppl., pi. 1, TelUna, fig. 3. 
Arctic Ocean, Bering Sea, North Japan, the Aleutian Islands and east to 
Cook’s Inlet, Alaska. 
PERONIDIA LUTEA VENULOSA Schrenck, 1861. 
Bull. Imp. Akad. Sci. St. Petersburg, vol. 4, p. 412 ; Reise in Amurl., p. 556, 
pi. 22, figs. 2-5. 
Shumagin Islands, Alaska; Sakhalin Island, Japan. 
Genus METIS H. and A. Adams, 1856. 
METIS ALTA Conrad, 1837. 
Journ. Acad. Nat. Sci. Phila., vol. 7, p. 258; Thes. Conch., TelUna, pi. 62, 
fig. 200. 
Santa Barbara, California, to San Diego. 
Genus MACOMA Leach, 1819. 
MACOMA MIDDENDORFFII DaU, 1884. 
Proc. U. S. Nat. Mus., vol. 7, p. 347 ; vol. 9, p. 308, pi. 4, fig. 11. 
Bering Strait, south to the Commander and Aleutian Islands and east- 
ward to Chirikoff Island, Alaska. 
MACOMA INCONGRUA Martens, 1865. 
Ann. Mag. Nat. Hist., vol. 16, p. 430 ; Conch. Icon. TelUna, pi. 27, fig. 146. 
Arctic Ocean, south to Japan on the west and to San Diego, California, 
on the east. 
MACOMA BROTA Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 413; Zool. Beechey’s Voy. Moll., pi. 44, 
fig. 7. 
Arctic Ocean. Bering Sea and south to Puget Sound. 
MACOMA BROTA LIPARA Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 414. 
Bering Sea to Puget Sound. 
MACOMA SITKANA Dali, 1900. 
Proc. U. S. Nat. Mus., vol. 23, pp. 307, 323, pi. 4, figs. 6, 7. 
Kodiak Island to Lituya Bay and Sitka, Alaska. 
