NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 103 



SCHIZOPYGA PERPINGUIS Hinds, 1844. 



Zool. Sulphur's Voy., p. 36, pi. 9, figs. 12, 13. 

 Puget Sound to Cerros Island, Lower California. 



Subgenus Zeuxis H. and A. Adams, 1853. 



ZEUXIS INSCULPTUS Carpenter, 1864. 



Proc. Cal. Acad. Sci., vol. 3, p. 223.— Tryon, Man., vol. 4, pi. 12, fig. 154. 

 Point Arena, California, to Cerros Island, Lower California. 



ZEUXIS INSCULPTUS EUPLEURA Dall, 1916. 



Proc. U. S. Nat. Mus., vol. 51, No. 21G6, p. 576. 



San Simeon, California, to Cerros Island, Lower California. 



ZEUXIS NODICINCTUS Adams, 1851. 



Proc. Zool. Soc, p. 110. 



San Diego, California, to Panama and the Galapagos Islands. 



ZEUXIS NODULIFERUS Philippi, 1848. 



Zeitschr. Mai., p. 136 ; Abb. u. Beschr., Buccinum, pi. 1, fig. 3. 

 San Diego, California, to the Gulf of California. 



ZEUXIS TEGULA Reeve, 1853. 



Conch. Icon., Nossa, fig. 98. 



San Francisco to San Diego, California. 



Subgenus Ilyanassa Stimpson, 1865. 

 ILYANASSA OBSOLETA Say, 1822, 



Journ. Acad. Nat. Sci. Phila., vol. 2, p. 232. — Gould, Inv. Mass., pi. 15, fig. 



210. 

 San Francisco, California, introduced with oysters from Atlantic Coast. 



Family COLUMBELLIDAE. 

 Genus ANACHIS H. and A. Adams, 1853. 



ANACHIS PENICILLATA Carpenter. 1865. 



Ann. Mag. Nat. Hist., ser. 3. vol. 15, p. 398. — Tryon, Man., vol. 5, pi. 58, 



fig. 46. 

 Santa Barbara, California, to Gulf of California. 



ANACHIS SUBTURRITA Carpenter. 1866. 



Proc. Cal. Acad. Sci., vol. 3, p. 223.— Tryon, Man., vol. 5, pi. 58, fig. 47. 

 San Pedro to San Diego, California. 



Genus COLUMBELLA Lamarck, 1799. 



Subgenus Alia H. and A. Adams, 1853. 



ALIA TUBEROSA Carpenter, 1865. 



Ann. Mag. Nat. Hist., ser. 3, vol. 15, p. 398. — Tryon, Man., vol. 5, pi. 50, 



figs. 40, 41. 

 Forrester Island, Alaska, to Gulf of California. 



