24 
BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
MUSCULUS PHENAX Dali, 1915. 
Nautilus, vol. 28, No. 12, p. 138. 
St. George Island, Bering Sea. 
MUSCULUS MARMORATUS Forbes, 1838. 
Malac. Monensis, p. 44. — Forbes and Hanley, Brit. Moll., pi. 45, fig. 4. 
Circumboreal? “Puget Sound” (P. P. C.) 
MUSCULUS SEMINUDUS Dali, 1897. 
Bull. Nat. Hist. Soc. Brit. Col., No. 2, p. 5, pi. 1, fig. 1. 
Bering Sea to Forrester Island, Alaska. 
Genus CRENELLA Brown, 1827. 
CRENELLA DECUSSATA Montagu, 1808. 
Test. Brit. Suppl., p. 69. — Forbes and Hanley, Brit. Moll., vol. 2, p. 210, 
pi. 45, fig. 2. r, t /f 
Bering Sea to the Santa Barbara Islands, California. OJju:> c. . 
CRENELLA LEANA Dali, 1897. 
Bull. Nat. Hist. Soc. Brit. Col., No. 2, p. 4, pi. 1, figs. 6, 7. 
Aleutian Islands, eastward to Middleton Island, Alaska. 
CRENELLA COLUMBIANA Dali, 1897. 
Bull. Nat. Hist. Soc. Brit. Col., No. 2, p. 4, p). 1, figs. 3, 5. 
Aleutian Islands to San Diego, California. 
CRENELLA DIVARICATA Orbigny, 1845. 
Moll Cuba, vol. 2, p. 311, pi. 27, figs. 56-59. 
Santa Barbara Islands to Panama Bay. Also West Indies. 
CRENELLA GRISEA Dali, 1897. 
Smithsonian Misc. Coll., vol. 50, No. 1727, p. 17L 
Bering Sea to Sitka, Alaska. 
CRENELLA ROTUNDATA Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, No. 2183, p. 406. 
Santa Cruz Island, California, in 155 fathoms. 
Order ANOMALODESMACEA. 
A: ENSIPHONIA. 
Family PERIPLOMATIDAE. 
Genus PERIPLOMA Schumacher, 1817. 
PERIPLOMA PLANIUSCULA Sowerby, 1834. 
Proc. Zool. Soc., p. 87 ; Journ. Acad. Nat. Sci. Phila., vol. 7, pi. 18, fig. 8. 
San Pedro, California, to Guayaquil. 
PERIPLOMA DISCUS Stearns, 1890. 
Proc. U. S. Nat. Mus., vol. 13, p. 222, pi. 16, figs. 1, 2. 
San Pedro Bay, California, to San Diego. 
