20 
BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
PSEUDAMUSIUM TILLAMOOKENSE Arnold, 1906. 
Tert. Pectens Cal., p. 139, pi. 48, tig. 3. 
Pribiloff Islands, Bering Sea, to San Diego. 
PSEUDAMUSIUM VANCOUVERENSE Whiteaves, 1893. (Plate 1, figs. 4, 5.) 
Ottawa Nat., a^oI. 7, p. 133, pi. 1, tig. 1. 
Bering Sea to San Diego, California. 
PSEUDAMUSIUM DAVIDSONI Dali, 1897. 
Nautilus, vol. 11, No. 8, p. 86; Proc. U. S. Nat. Mus., vol. 24, p. 559, pi. 40, 
tigs. 5, 6. 
Davidson and Bowers Banks, Bering Sea. 
PSEUDAMUSIUM BISTEIATUM Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 404. 
Off San Diego, California, in 822 fathoms. 
PSEUDAMUSIUM INCONGRUUM Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 403. 
Off San Diego, California, in 684 fathoms. 
PSEUDAMUSIUM ANDERSONI Dali, 1918. 
Sci. Res. Canadian Arctic Exp., vol. 8, pt A, p. 19a, pi. 2, figs. 7, 8. 
Dolphin and Union Strait, Arctic Ocean. 
Subgenus Propea^iusium Gregorio, 1883. 
PROPEAMUSIUM ALASKENSE Dall, 1871. (Plate 1, fig. 2.) 
Amer. Journ. Conch., vol. 7, p. 155, pi. 16, fig. 4. 
Pribiloff Islands, Bering Sea, and southward to the Santa Barbara Islands, 
California. Japan. 
Genus HINNITES Defrance, 1821. 
HINNITES GIGANTEUS Gray, 1825. 
Ann. Phil., ser. 2, vol. 12, p. 103. — Arnold, Tert. Pectens Cal., pi. 29, figs. 1, 2. 
Aleutian Islands to Magdalena Bay, Lower California. 
Family LIMIDAE. 
Genus LIMA (Bruguiere) Cuvier, 1798. 
Subgenus Mantellum Bolten, 1798. 
MANTELLUM DEHISCENS Conrad, 1837. 
Journ. Acad. Nat. Sci. Phila, vol. 7, p. 247, pi. 19, fig. 7. 
Monterey, California, to Acapulco, Mexico. 
Subgenus Limatula S. Wood, 1839. 
LIMATULA ATTENUATA Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 404. 
Southern Bering Sea, the Aleutian Islands and eastward to the Shumagin 
Islands, Alaska. 
LIMATULA SUBAURICULATA Montagu, 1808. 
Test. Brit. SuppL, p. 63. — Jeffreys, Brit. Conch., vol. 5, pi. 25, fig. 3. 
British Columbia to San Quentin Bay, Lower California. Also Atlantic. 
