24 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



MUSCULUS PHENAX Dall, 1915. 



Nautilus, vol. 28, No. 12, p. 138. 

 St. George Island, Bering Sea. 



MUSCULUS MAKMORATUS Forbes. 1838. 



• Malac. Monensis, p. 44. — Forbes and Hanley, Brit. Moll., pi. 45, fig. 4. 

 Circuniboreal? " Puget Sound" (P. P. C.) 



MUSCULUS SEMINUDUS Dall, 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. — Fokbes and Hanley, Brit. Moll., vol. 2, p. 210, 



pi. 45, fig. 2. 

 Bering Sea to the Santa Barbara Islands, California. 



CRENELLA LEANA Dall, 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 Dall, 1897. 



Bull. Nat. Hist. Soc. Brit. Col., No. 2, p. 4, pi. 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 Dall, 1897. 



Smithsonian Misc. Coll., vol. 50, No. 1727, p. 171. 

 Bering Sea to Sitka, Alaska. 



CRENELLA ROTUNDATA Dall, 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. 



