NOKTHWEST COAST MAKINE SHELLBEARING MOLLUSKS. 149 
Subgenus Iphinoe H. and A. Adams, 1854, 
IPHINOE CORONATA Gould, 1860. (Plate 11, fig. 2.) 
Proc. Boston Soc. Nat. Hist, vol. 7, p. 324 . — Teyon, Man., vol. 7, pi. 7, figs. 
53, 54. 
Arctic Ocean and Bering Sea. 
IPHINOE KROYERI Philippi, 1849. (Plate 11, fig. 1.) 
Zeitschr. f. Mai., vol. 5, p. 175. — Teyon, Man., vol. 7, pi. 8, fig, 61. 
Arctic and Bering Seas, eastward to tbe Shumagin Islands. 
IPHINOE KELSEYI Dali, 1905. 
Proc. U. S. Nat. Mus., vol. 34, No. 1610, p. 254. 
Off San Diego, Cal., and Point San Quentin, Lower California. 
Subgenus Peovanna Dali, 1918. 
PROVANNA LOMANA Dali, 1918. 
Proc. Biol. Soc. Wash., vol. 31, p. 7. 
Off Point Loma, San Diego County, California, in 650 fathoms. 
Family CAECIDAE. 
Genus CAECUM Fleming, 1817. 
CAECUM CALIFORNICUM Dali, 1885. 
Proc. U. S. Nat. Mus., vol. 8, p. 541 . — Teyon, Man., vol. 8, pi. 66, fig. 65. 
Monterey, California, to Lower California. 
CAECUM DALLI Bartsch, 1920. 
Journ. Wash. Acad. Sci., vol. 10, 1 ^ 20 ^ 
San Pedro, California, to Lower California. 
CAECUM LICALUM Bartsch, 1920. 
Journ. Wash. Acad. Sci., vol. 10, 1920^ 
Monterey to San Diego, California. 
CAECUM DIEGENSE Bartsch, 1920. 
Journ. Wash. Acad. Sci., vol. 10, 1920^ 
San Diego, California. 
CAECUM GRIPPI Bartsch, 1920. 
Journ. Wash. Acad. Sci., vol. 10, 1920^^, 
Off San Diego, 15 to 20 fathoms. 
Genus MICRANELLUM Bartsch, 1920. 
MICRANELLUM CREBRICINCTUM Carpenter, 1864. 
Proc. Cal. Acad. Sci., vol. 3, p. 215.— Teyon, Man., vol. 8, pi. 67, figs. 71, 83. 
Monterey, California, to Todos Santos Bay, Lower California. S 
MICRANELLUM PEDROENSE Bartsch, 1920. 
Journ. Wash. Acad. Sci., vol. 10, 1920^ 
San Pedro to San Diego, California. 
