38 BULLETIN 112, UNITED STATES NATIONAL MUSEUM. 
PSEUDOPYTHINA COMPRESSA Dali, 1899. 
Proc. U. S. Nat. Mus,, vol. 21, p. 888, pi. 87, figs. 1, 8. 
Cape Lisburne, Arctic Ocean, to Acapulco. Commensal with Crustacean. 
PSEUDOPYTHINA MYACIFORMIS Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 412. 
Commensal with Crustacean. Puget Sound. 
Genus BORNIA Philippi, 1836. 
BORNIA RETIFERA Dali, 1899. 
Proc. U. S. Nat. Mus., vol. 21, p. 889, pi. 87, fig. 2. ' 
Monterey to Santa Barbara Islands, California. 
Genus ‘LEPTON Turton, 1822. 
LEPTON MEROEUM Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 643. 
San Diego, California. 
Genus LASAEA Leach, 1827. 
LASAEA RUBRA Montagu, 1804. 
Test. Brit., p. 83, pi. 27, fig. 4. — Turton, Dithyra Brit., p. 57, pi. 11, figs. 7-8. 
Vancouver Island, British Columbia, to Callao, Peru. Also Atlantic. 
Genus TURTONIA Alder, 1848. 
TURTONIA MINUTA Fabricius, 1780. 
Fauna Gronl., p. 412. — Forbes and Hanley, Brit. Moll., vol. 2, p. 81, pi. 18, 
fig. 7. 
Bering Strait and south to Magdalena Bay, Lower California. Also North- 
ern Atlantic. 
TURTONIA OCCIDENTALIS Dail, 1871. 
Amer. Journ. Conch., vol. 7, p. 150, pi. 14, figs. 12, 13. 
Plover Bay, Bering Sea. 
Genus SPORTELLA Deshayes, 1858. 
SPORTELLA CALIFORNICA Dali, 1899. 
Proc. U. S. Nat. Mus., vol. 21, p. 885, pi. 88, fig. 5. 
Monterey, California. 
Genus ANISODONTA Deshayes, 1858. 
ANISODONTA? PELLUCIDA Dali, 1916. 
Proc. U. S. Nat. Mus., vol. 52, p. 411. 
Monterey Bay, California, otf Del Monte. 
Family CHLAMYDOCONCHIDAE. 
Genus CHLAMYDOCONCHA Dali, 1884. 
GHLAMYDOCONCHA ORCUTTI Dali, 1884. 
Science, vol. 4, No. 76, p. 50. — Bernard, Ann. Sci. Nat., ser. 8, vol. 4, Zool. 
1897, p. 221-252, pi. 1, 2, 
Monterey to False Bay, San Diego County, California. 
