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., vol. 7, p. 133, pi. 1, fig. 1. 

 Bering Sea to San Diego, California. 



PSEUDAMUSIUM DAVIDSONI Dall, 1897. 



Nautilus, vol. 11, No. 8, p. 86; Proc. U. S. Nat. Mus., vol. 24, p. 530, pi. 40, 



figs. 5, 6. 

 Davidson and Bowers Banks, Bering Sea. 



PSEUDAMUSIUM BISTRIATUM Dall, 1916. 

 Proc. U. S. Nat. Mus., vol. 52, p. 404. 

 Off San Diego, California, in 822 fathoms. 



PSEUDAMUSIUM INCONGRUUM Dall, 1916. 



Proc. U. S. Nat. Mus., vol. 52, p. 403. 

 Off San Diego, California, in 6S4 fathoms. 



PSEUDAMUSIUM ANDERSONI Dall, 1918. 



Sci. Pes. Canadian Arctic Exp., vol. S, pt. A, p. 19ff, pi. 2, figs. 7, 8. 

 Dolphin and Union Strait, Arctic Ocean. 



Subgenus Propeamusium Gregorio, 1883. 



PROPEAMUSIUM ALASKENSE Dall, 1871. (Plate 1, fig. 2.) 



Anier. 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 Dall, 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 Onentin Bay. Lower California. Also Atlantic. 



