144 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
CERITHIOPSIS ALCIMA Bartsch, 1911. 
Proc. U. S. Nat. Mus., vol. 40, p. 350, pi. 39, fig. 2. 
San Pedro, California, to South Coronado Island. 
INCERTAE SEDIS. 
CERITHIOPSIS COLUMNA Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 660; Proc. U. S. Nat. Mus., vol. 40, p. 354, 
pi. 36, fig. 6. 
Vancouver Island to Monterey Bay. 
CERITHIOPSIS ARNOLDI Bartsch, 1911. 
Proc. U. S. Nat. Mus., vol. 40, p. 357, pi. 39, fig. 3. 
San Pedro Bay, California. 
CERITHIOPSIS TRUNCATA Dali, 1886. 
Proc. U. S. Nat. Mus., vol. 9, p. 304, pi. 4, fig. 5; vol. 40, pi. 40, fig. 2. 
Unalaska Island, Alaska, to Puget Sound. 
CERITHIOPSIS STEPHENSAE Bartsch, 1909. 
Proc. U. S. Nat. Mus., vol. 37, p. 399, fig. ; vol. 40, pi. 38, fig. 7. 
Port Frederick, Alaska, to Puget Sound. 
CERITHIOPSIS INGENS Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, p. 180 ; vol. 40, pi. 41, fig. 4. 
Monterey, California. 
CERITHIOPSIS TUMIDA Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, p. 179; vol. 40, pi. 41, fig. 3. 
Monterey, California. 
Genus SEILA A. Adams, 1861. 
SEILA MONTEREYENSIS Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, No. 1504, p. 177 ; vol. 40, pi. 41, fig. 5. 
Monterey to Todos Santos Bay, Lower California. 
Genus METAXIA Monterosato, 1884. 
METAXIA DIADEMA Bartsch, 1907. 
Proc. U. S. Nat. Mus., vol. 33, No. 1564, p. 182. , 
Monterey to San Diego, California. S'. 
Family CERITHIIDAE. 
Genus DIASTOMA Deshayes, 1861. 
DIASTOMA FASTIGIATA Carpenter, 1864. 
Suppl. Rep. Brit. Soc., p. 655; Proc. U. S. Nat. Mus., vol. 39, p. 581, fig. 1, 
1911. 
Santa Barbara, California. Pleistocene. 
DIASTOMA OLDROYDAE Bartsch, 1911. 
Proc. U. S. Nat. Mus., vol. 39, p. 583, fig. 3. 
San Pedro, California. 
