WEST AMERICAN HALIOTIS — BARTSCH 55 



scheme of the interior is pearly gray with iridescent, prismatic, 

 scattered flashes. 



The type, U.S.N.M. No. 60425, comes from Catalina Island. 

 Placed flat on the aperture it measures: Height, 57 mm.; greater 

 diameter, 140 mm. ; lesser diameter, 107 mm. 



There are two additional specimens in our collection, one of which, 

 a little smaller than the type, U.S.N.M. No. 98329, collected by Dr. 

 Cooper at Santa Cmz Island, measures: Height, 50 mm,; greater 

 diameter, 119 mm.; lesser diameter, 94 mm. The other, U.S.N.M. 

 No. 11868, a very large specimen, bears the locality label San Diego, 

 which I somewhat question. This measures : Height, 77 mm. ; greater 

 diameter, 193 mm. ; lesser diameter, 148 mm. 



This species suggests Haliotis kamtschatkana. Its gigantic size 

 and comparatively feebler sculpture will readily distinguish it from 

 that. I take pleasure in naming it for the founder of the Smith- 

 sonian Institution, James Smithson. 



HALIOTIS DALLI Henderson 



1915. Haliotis (Padollus) daUi Henderson, Proc. U. S. Nat. Mus., vol. 48, p. 661, 

 pis. 45, 46 (lower figures). 



This small species of Haliotis was dredged by the United States 

 Bureau of Fisheries steamer Albatross in 33 fathoms near Charles 

 Island, Galapagos. 



HALIOTIS CRACHERODII Leach 



This species ranges from San Francisco to San Quentin Bay, along 

 the mainland; in other words, through the major portion of the 

 Californian faunal area, stretching, however, over part of the Ore- 

 gonian area to the north. It extends also over the off-lying islands. 



Haliotis calif orniens is Swainson must be relegated to the rank of 

 subspecies, for the organisms on Cerros and San Bonita Islands form 

 perfect intergrades between the typical H. cracherodii and H. cali- 

 fomiensis. Two subspecies, therefore, will be recognized. 



HALIOTIS CRACHERODII CRACHERODII Leach 



1817. Haliotis cracherodii Leach, Zool. Misc., vol. 1, p. 31, pi. 58. 



1892. Haliotis cracherodii splendidula Williamson, Proc. U. S. Nat. Mus., vol. 



15, p. 198. 

 1900. Haliotis rosea Okcutt, West Amer. Sci., vol. 10, p. 30. 

 1900. Haliotis corrugata diegoensis Orcutt, West Amer. Sci., vol. 30, p. 31. 

 1907. Haliotis cracherodii holzneri HEMrnnx, Trans. San Diego Soc. Nat. Hist., 



vol. 1, p. 59. 

 1919. Haliotis cracherodii imperforata Dall, Proc. U. S. Nat. Mus., vol. 56, 



p. 370. 

 3921. Haliotis cracherodii holzneri Dall, U. S. Nat. Mus. Bull. 112, pi. 20. 

 1921. Haliotis cracherodii imperforata Dall, U. S. Nat. Mus., Bull. 112, pi. 21. 



