CLASS GASTROPODA 
185 
and about 30 between the summit and the periphery of the penultimate 
turn. Sutures strongly impressed. Periphery of the last whorl somewhat 
angulated. Base well-rounded, moderately long, marked like the spire. 
Aperture elongate-oval, slightly effuse anteriorly; posterior angle acute; 
outer lip decidedly sinuous, bent back at the posterior angle to almost form 
a notch, thin; inner lip moderately long, oblique, slightly curved and 
slightly revolute, provided with a strong fold at its insertion; parietal wall 
glazed with a thin callus. Length, 5.6; diameter, 2 mm. (Bartsch.) 
Type in United States National Museum, No. 211558. Type locality, 
San Pedro, California. 
Range. Known only from type locality. 
Odostomia baranoffensis Dali and Bartsch, 1909 
Plate 60, fig. 3 
Bulletin 68, United States National Museum, 215; PL 25, fig. 3. 
Shell elongate-ovate, rather stout, yellowish-white. Nuclear whorls 
obliquely immersed in the first of the succeeding turns, the outer edge of 
the last turn only being visible. Post-nuclear whorls well-rounded, with 
a narrow, tabulate shoulder at the summit. Suture rendered subchanneled, 
by the shoulder at the summit of the whorls. Periphery and base of the 
last whorl inflated, well-rounded, the latter with a depressed pit, but no 
perforation in the umbilical area. Entire surface marked by lines of 
growth and very fine spiral striations. Aperture ear-shaped; posterior angle 
obtuse; outer lip thick within, thin at the edge; columella very stout, 
twisted and obliquely revolute, armed with a thick oblique fold opposite 
the umbilical chink; parietal wall covered by a thin callus. Length, 6.3; 
diameter, 2.8 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 204011. Type locality, 
Bear Bay, Peril Straits, Baranoff Island, Alaska. 
Range. Baranoff and Admiralty Islands, Alaska. 
Odostomia barkleyensis Dali and Bartsch, 1910 
Canada, Department of Mines, Geological Survey Branch, Memoir No. 14-N, 19; 
PL 2, fig. 8. 
Shell small, regularly conic, bluish-white. Nuclear whorls deeply, 
obliquely immersed in the first of the succeeding turns, above which only 
the tilted edge of the last volution projects. Post-nuclear whorls slightly 
rounded, marked by fine retractive lines of growth and numerous fine, 
spiral striations. Sutures strongly impressed. Periphery of the last whorl 
subangulated. Base rather short, sloping from the subangulated periphery 
[483] 
