CLASS GASTROPODA 
149 
Length, 53; breadth, 48; alt., 18 mm. (Tryon and Pilsbry, Manual of 
Conchology.) 
Type in St. Petersburg. Type locality ? 
Range. Southern Bering Sea to Tugar and the Shentar Islands on 
the west, Pribilof and Aleutian Islands to Gulf of California. 
Acmaea scutum pintadina Gould, 1846 
Plate 94, fig. 14 
Proceedings of the Boston Society of Natural History, 2:151. Tryon and Pilsbry, 
Manual of Conchology, 13: PI. 9, fig. 6. 
Testa diversissime figurata et picta, tenuis, ovato-rotundata, radiatim 
et confertim striata, smaragdina, interdum fuscescens vel cinerascens, ma- 
culis crebis albidis tessellata aut radiata; apice plerumque sub-centrali, 
plus minusve elevata: facies interna coeruleo-albida, nitens; fundo piceo; 
limbo lato, piceo et albido tessellato. Long., 2; lat., 1%; alt., % poll. 
(Gould.) 
Shell large, flat, open, apex subcentral; tessellated white and dark. 
(Tryon and Pilsbry, Manual of Conchology .) 
Type in ? Type locality, Straits of Juan de Fuca, Puget Sound, Wash¬ 
ington. 
Range. Aleutian Islands to Monterey, California. 
Acmaea scutum cribraria Carpenter, 1866 
American Journal of Conchology, 2:335. 
This shell when young is dark olive closely dotted all over with white, 
the eroded apex black; when adult it is usually uniform dull slate-color 
outside with a ring of light around the black apical spot; inside it has a 
wide dark border, a large, irregular central dark patch, and generally is 
suffused with dark brown all over. Sculpture obsolete. (Tryon and 
Pilsbry, Manual of Conchology.) 
Type in ? Type locality, California. 
Range. Neah Bay, Washington, to Santa Barbara, California. 
Acmaea scutum ochracea Dali, 1871 
American Journal of Conchology, 6:249; PI. 17, fig. 35. 
There is another very well marked and pretty variety which I should 
refer to this species {patina), and as it does not appear to have been 
described, I would propose for it the name of ochracea; externally it is 
of a very light yellowish-brown, without spots or rays; internally white 
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