4B BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 



MACOMA EXPANSA Carpenter. 1864. 



Suppl. Rep. Brit. Assoc, p. (539; Proc. Acad. Nat. Sci. Phila. for 1865, p. 56. 

 Puget Sound to La Jolla, California. 



MACOMA YOLDIFORMIS Carpenter, 1864. 



Suppl. Rep. Brit. Assoc, p. 639; Proc Acad. Nat. Sci. Phila. for 1865, p. 55.*— 



Arnold, Pal. San Pedro, pi. 16, fig. 6. 

 Fuea Strait to San Diego, California. 



MACOMA TRUNCAEIA Dall, 1916. 



Proc U. S. Nat. Mus., vol. 52, No. 2183, p. -114. 

 Island near Cape Halkett, Arctic Ocean. 



MACOMA ALASKANA Dall, 1900. 



Proc U. S. Nat. Mus., vol. 23, p. 323, pi. 3, fig. 5. 

 Lituya Bay, to Gulf of Georgia. 



Section REXITHAERUS Conrad, 1869. 



MACOMA INDENTATA Carpenter, 1864. 



Suppl. Rep. Brit. Assoc, p. 639; Proc. Cal. Acad. Sci., vol. 3. p. 208.— Aknoi D, 



Pal. San Pedro, pi. 16, fig. 1. 

 Puget Sound to Lower California. 



MACOMA INDENTATA TENUIROSTRIS Dall, 1900. 



Proc U. S. Nat. Mus., vol. 23, No. 1210, p. 324. 



San Pedro and the Santa Barbara Islands, to San Diego (Kelsey). 



MACOMA SECTA Conrad, 1837. 



Journ. Acad. Nat. Sci. Phila., vol. 7, p. 257; Thes. Conch., Tellina, pi. 65, 



figs. 245, 248. 

 Vancouver Island and south to the Gulf of California. Japan ? 



Family SEMELIDAE. 

 Genus SEMELE Schumacher, 1817. 



SEMELE DECISA Conrad, 1837. 



Journ. Acad. Nat. Sci. Phila., vol. 7, p. 239, pi. 19, fig. 2. 

 San Pedro to San Diego, California. 



SEMELE STRIOSA C. B. Adama, 1852. 

 Panama Shells, p. 291. 

 Catalina Island, California, to Panama. 



r 

 SEMELE RUPICOLA Dall, 1915. 



Proc Acad. Nat. Sci. Phila. for 1915, p. 26. 

 Santa Cruz, California, to Gulf of California. 



SEMELE RUBROPICTA Dall, 1871. 



Amer. Journ. Conch., vol. 7, p. 144, pi. 14, fig. 10. 

 Forresicr Island, Alaska, to Tia Juana. Lowe.- California. 



SEMELE PACIFICA Dall, 1915. 



Proc Acad. Nat. Sci. Phila. for 1915, p. 27. 

 Catalina Island. California, to Acapulco. 



