CLASS GASTROPODA 
219 
in our drawing, which should be considered as an outline sketch only.) 
Periphery and base of the last whorl decidedly rounded and inflated, 
marked like the space between the sutures. Aperture large, suboval, 
slightly effuse anteriorly, posterior angle acute; outer lip sharp at the edge 
but thick within; columella very strong, curved, re-enforced by the body 
whorl, from which the slightly reflected edge is separated only by a narrow 
line. A strong, oblique fold, not completely visible when the aperture is 
viewed squarely, is located a little anterior to the insertion of the colu¬ 
mella. Length, 5.3; diameter, 3.1 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 36336. Type locality, 
Killisnoo, Alaska. 
Range. Known only from type locality. 
Odostomia moratora Dali and Bartsch, 1909 
Plate 65, fig. 7 
Bulletin 68, United States National Museum, 225; PI. 30, fig. 7. 
Shell elongate-ovate, imperforate, yellowish-white. Nuclear whorls 
decollated. Post-nuclear whorls strongly rounded, moderately contracted 
at the sutures, narrowly flatly shouldered at the summit; marked by strong 
lines of growth and subobsolete fine spiral lirations, which lend the 
surface a somewhat reticulated appearance. The spaces between the feeble 
lirations are marked by numerous very fine spiral striations. Periphery of 
the last whorl and base inflated, strongly rounded, marked like the spire. 
Aperture oval, posterior angle obtuse; outer lip thin; columella stout, 
oblique, revolute, provided with a strong fold a little below its insertion. 
Length, 9.5; diameter, 4.9 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 207261. Type locality, 
Point Reyes, California. 
Range. Known only from type locality. 
Odostomia nota Dali and Bartsch, 1909 
Plate 64, fig. 6 
Bulletin 68, United States National Museum, 226; PI. 28, fig. 6. 
Shell very elongate-ovate, light-yellow. 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 moderately rounded, 
slightly contracted at the sutures, narrowly tabulately shouldered at the 
summits, marked by numerous, closely-spaced, wavy, spiral striations. 
Periphery and base of the last whorl somewhat inflated, well-rounded, 
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