NORTHWEST COAST MARINE SHELLBEARING MOLLUSKS. 191 
ISCHNOCHITON RITTERI Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 55, No. 2283, p., 505. 
Juneau Channel, Alaska. 
ISCHNOCHITON RETIPOROSUS Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 649. — Pilsbry, Man., vol. 15, p. 77 ; pi. 16, figs. 
47, 50-53. 
Victoria, British Columbia, to San Pedro, California, , Ur 
ISCHNOCHITON RETIPOROSUS PUNCTATUS Whiteaves, 1886. 
Trans. Roy. Soc. Canada, vol. 4, pt. 4, p. 125, figs. 
Duncan Bay, British Columbia. 
ISCHNOCHITON VENEZIUS Dali, 1919. 
Proc. U. S. Nat. Mus., vol. 55, No. 2283, p., 509. 
Venice, Los Angeles County, California. 
ISCHNOCHITON SCROBICULATUS Middendorff, 1847. 
Mai. Rossica, vol. 1 p. 127, pi. 14, figs. 4-7. — Pilsbry, Man., vol. 14, p. 76, 
pi. 8, figs. 66-68. 
Bodega Bay, California. 
ISCHNOCHITON LIVIDUS Middendorff, 1847. 
Mai. Rossica, vol. 1, p. 124, pi. 13, figs. 3, 4. — Pilsbry, Man., vol. 14, p. 76, 
pi. 6, figs. 22-24. 
Sitka, Alaska. ^ 
ISCHNOCHITON ALASCENSIS Thiele, 1910. 
Zoologica, vol. 22, Heft. 56, pt. 2, p. 79, pi. 7, figs. 58-61. 
Sitka, Alaska. 
ISCHNOCHITON INTERSTINCTUS Gould, 1846. 
Proc. Boston Soc. Nat. Hist., vol. 2, p. 145; Rep. U. S. Expl. Exp., Moll., 
p. 315, pi. 23, fig. 423. 
Aleutian Islands, to Sitka and Catalina Island, California. 
ISCHNOCHITON RADIANS Carpenter, 1892. 
Pilsbry, Man., vol. 14, p. 121 ; vol. 15, p. 75, pi. 16, figs. 48, 49. 
Prince of Wales Island, Alaska, to San Pedro, California. 
ISCHNOCHITON SCABRICOSTATUS Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 649. — Pilsbry, Man., vol. 14, p, 121; vol. 15, 
p. 76, pi. 16, figs. 55, 56. 
San Pedro and Catalina Island, California, to Cerros Island, Lower Cali- 
fornia. 
ISCHNOCHITON AUREOTINCTUS Carpenter, 1892. 
Pilsbry, Man.', vol. 14, p. 123. 
Catalina Island, 80 fathoms, to Cerros Island, Lower California. 
ISCHNOCHITON VEREDENTIENS Carpenter, 1864. 
Suppl. Rep. Brit. Assoc., p. 649. — Pilsbry, Man., vol. 14, p. 122. 
Point New Year to Catalina Island, California. 
ISCHNOCHITON NEWCOMBI Carpenter, 1892. 
Pilsbry, Man., vol. 14, p. 120. 
Catalina Island, California. 
