NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 115 
ASPEROSCALA LAGUNARUM Dali, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 477. 
Laguna Beach, California. 
Subgenus Ciksoteema Morch, 1852. 
? CIRSOTREMA MONTEREYENSIS Dali, 1907. 
Nautilus, vol. 20, No. 11, p. 128. 
Monterey to San Pedro, California. 
Subgenus Nitidoscala De Boury, 1909. 
NITIDOSCALA INDIANORUM Carpenter, 1865. 
Ann. Mag. Nat. Hist, ser. 3, vol. 14, p. 28. — Tryon, Man., vol. 9, pi. 14, 
fig. 48. 
Forrester Island, Alaska, to Todos Santos Bay, Lower California. 
NITIDOSCALA TINCTA Carpenter, 1865. 
Ann. Mag. Nat. Hist., ser. 3, vol. 14, p. 28 . — Tryon, Man., vol. 9, pi. 14, 
fig. 49. 
Monterey, California, to the Gulf of California. 
NITIDOSCALA FALLACIOSA Dali, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 478 . — Keep, West Coast Shells, 
p. 183, fig. 174. 
Monterey, California, to Gulf of California. 
NITIDOSCALA PERSUTURA Dali, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 478. 
San Diego, California. 
NITIDOSCALA SUBCORONATA Carpenter, 186^. 
Proc. Cal. Acad. Sci., vol. 3, p. 221. 
Vancouver Island to San Diego, California. 
NITIDOSCALA DENSICLATHRATA Dali, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 478. 
Neah Bay, Washington, to San Diego, California. 
NITIDOSCALA CREBRICOSTATA Carpenter, 186^. 
Proc. Cal. Acad. Sci., vol. 3, p. 222. 
Vancouver Island to Gulf of California. 
NITIDOSCALA HEXAGONA Sowerby, 1844. 
Proc. Zool. Soc., p. 29 ; Thes. Conch., vol. 1, p. 98, pi. 33, fig. 67, 1847. 
Santa Cruz, California, to Panama. 
NITIDOSCALA? TIARA Carpenter, 1856. 
Proc. Zool. Soc., p. 164. 
Catalina Island, California, to Todos Santos Bay, Lower California. 
Panama ? 
NITIDOSCALA COLUMBIANA Dali, 1917. 
Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 481. 
Olf Columbia River, Oregon, to Gulf of California. Ju , L^VcU^TT, 
NITIDOSCALA SAWINAE Dali. 1903. (Plate 6, fig. 12.) 
Proc. Biol. Soc. Wash., vol. 16, p. 175. 
Monterey to Catalina Island- California. f^o^-rh-Lu C, 
