CLASS GASTROPODA 
145 
straight, decidedly revolute. Length, 19.6; diameter, 5 mm. (Dali and 
Bartsch.) 
Type in United States National Museum, No. 162686. Type locality, 
Santa Rosa Island, California. 
Range. Santa Rosa to Catalina Island, California. 
Turbonilla eschscholtzi Dali and Bartsch, 1907 
Plate 56, fig. 8; Plate 54, fig. 10 
Proceedings of the United States National Museum, 33:513; PI. 45, fig. 10. 
Shell large, elongate-conic, brown, having three obscure bands of dark 
brown, one of which is at the summit, another at the periphery, while a 
third is halfway between these on the exposed portion of the whorl of the 
spire. Nuclear whorls decollated. Post-nuclear turns moderately rounded, 
ornamented by low, rounded, rather distantly spaced, slightly protractive 
axial ribs, which become weakened and somewhat flattened as they ap¬ 
proach the appressed summit, and many fine lines of growth both on the 
ribs and in the intercostal spaces. In addition to the axial sculpture the 
whorls are crossed by twelve deeply incised, somewhat irregularly spaced, 
spiral lines, the raised spaces between which are again divided by many 
fine striae. All the spiral markings pass over the intercostal spaces and the 
ribs. Periphery of the last whorl obscurely angular, marked by the feeble 
continuations of the ribs, which vanish immediately below the periphery 
and the usual fine lines of growth and spiral striation. Base rather short, 
well-rounded, brown, with a narrow whitish band about the umbilicus, 
marked by closely spaced continuous wavy spiral striation, which varies in 
strength, several finer striae alternating with the stronger. Aperture sub¬ 
quadrate, outer lip thin, showing four narrow dark-brown bands within, 
upon a lighter background—these are the three already referred to and a 
fourth one on the base adjoining the periphery; columella almost vertical, 
slightly twisted and revolute. Length, 13.3; diameter, 4 mm. (Dali and 
Bartsch.) 
Type in United States National Museum, No. 196241. Type locality, 
Carter Bay, British Columbia. 
Range. Port Simpson to Vancouver Island, British Columbia. 
Turbonilla catalinensis Dali and Bartsch, 1909 
Plate 56, figs. 10, 10a 
Bulletin 68, United States National Museum, 113; PI. 11, figs. 10, 10a. 
Shell elongate-conic, very slender. Nuclear whorls two and one-half, 
forming a depressed, helicoid spire, whose axis is at right angles to that of 
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