CLASS GASTROPODA 
161 
Shell abbreviate!/ ovate, thick, stout, slightly striated longitudinally, 
spire short, columella arched, smooth, callous at the upper part, two- 
plaited at the base, aperture effused at the base; bluish-gray, sutures brown, 
columella and base deep violet; aperture, blue-gray, violet at the edge. 
(Conchologia Iconica.) 
Type in Museum Cuming. Type locality, Monterey, California. 
Range. Monterey to San Diego, California. Fossil: Pliocene of Dead- 
man Island, San Pedro, California. 
Olivella biplicata angelina T. S. Oldroyd, 1921 
Plate 26, figs. 17, 17a 
Nautilus, 34; PI. 5, fig. 6. 
This variety differs from Sowerby’s type in being more delicate and 
slender, with callus not so heavy, spire more elevated, sloping more grad¬ 
ually from the middle of the shell to the apex. Sowerby’s type came from 
Monterey and does not occur near San Pedro, living, but is found fossil 
there in the Pliocene and lower Pleistocene. Length of type, 27; width, 
13 mm. (T. S. Oldroyd.) 
Type in Oldroyd Collection, Stanford University. Type locality, Los 
Angeles County, California. 
Range. . San Pedro to San Diego, California. 
Olivella biplicata fucana T. S. Oldroyd, 1921 
/ Plate 26, figs. 23, 23a 
Nautilus, 34:118; PI. 5, fig. 4. 
Shell broader across the middle and lower part of the aperture, than 
var. angelina , spire running more sharply to a point from the middle of 
the shell. Color more uniform, being a light drab. Length, 28; breadth, 
14 mm. (T. S. Oldroyd.) 
Type in Stanford Collection. Type locality, Straits of Juan de Fuca. 
Range. British Columbia, Vancouver Island, to Straits of Juan de 
Fuca. Fossil: Pliocene at San Pedro. 
Olivella biplicata lapillus Vanatta, 1915 
Nautilus, 29:71. Sowerby, Thesaurus Conchyliorum, 4; PI. 18, fig. 290. 
Shell globose, white, spire short, interior of the aperture cream-colored. 
Alt., 24; diam., 14 mm. (Vanatta.) 
Type in Philadelphia Academy of Natural Sciences, No. 111977. Type 
locality, San Pedro, California. 
Range. San Pedro to San Diego, California. 
[1611 
