NORTHWEST COAST MARINE SHELLBEA1UNG MOJLLUSKS. 115 

 ASPEROSCALA LAGUNARUM Dall, 1917. 



Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 477. 

 Laguna Beach, California. 



Subgenus Ciksotrema Morch, 1852. 



? CIRSOTREMA MONTEREYENSIS Dall, 1907. 



Nautilus, vol. 20, No. 11, p. 128. 

 Monterey to San Pedro, California. 



Subgenus Nttidoscala De Boury, 1909. 



N1TIDOSCALA INDIANORUM Carpenter, 1865. 



Ann. Mag. Nat. Hist., ser. 3, vol. 14, p. 28.— Tbyon, Man., vol. 9, pi. 14, 



fig. 48. 

 Forrester Island, Alaska, to Todos Santos Bay, Lower California. 



NIT1DOSCALA 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 Dall, 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 Dall, 1917. 



Proc. U. S. Nat. Mus., vol. 53; No. 2217, p. 478. 

 San Diego, California. 



NITIDOSCALA SUBCORONATA Carpenter, 1866. 



Proc. Cal. Acad. Sci., vol. 3, p. 221. 

 Vancouver Island to San Diego, California. 



NITIDOSCALA DENSICLATHRATA Dall, 1917. 



Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 478. 

 Neah Bay, Washington, to San Diego, California. 



NITIDOSCALA CREBRICOSTATA Carpenter, 1866. 



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 Dall, 1917. 



Proc. U. S. Nat. Mus., vol. 53, No. 2217, p. 481. 

 Off Columbia River, Oregon, to Gulf of California. 



NITIDOSCALA SAWINAE Dall, 1903. (Plate 6, fig. 12.) 



Proc. Biol. Soc. Wash., vol. 16, p. 175. 

 Monterey to Catalina Island. California. 



