46 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



Subgenus Oudardia Monterosato, 18S4. 



OUDARDIA BUTTONI Dall, 1900. 



Proc. U. S. Nat. Mus., vol. 23, p. 304, pi. 4, figs. 12, 13. 

 Lituya Bay, Alaska, to the Gulf of California. 



Subgenus Peronidia Dall, 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 Dall, 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, Tellina, 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 Ainurl., 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. 25S ; Thes. Conch., Tellina, pi. 62, 



fig. 200. 

 Santa Barbara, California, to San Diego. 



Genus MACOMA Leach, 1819. 



MACOMA MIDDENDORFFII Dall, 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. Tellina, pi. 27, fig. 146. 

 Arctic Ocean, south to Japan on the west and to San Diego, California, 

 on the east. 



MACOMA BROTA Dall, 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 Dall, 1916. 



Proc. U. S. Nat. Mus., vol. 52, i>. -114. 

 Bering Sea to Puget Sound. 



MACOMA SITKANA Dall, 1900. 



Proc. U. S. Nat. Mus., vol. 23, pp. 307, 323, pi. 4, figs. 6, 7. 

 Kodiak Island to Lituya Bay and Sitka, Alaska. 



