190 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Type in United States National Museum, No. 126658. Type locality, 
Victoria, Vancouver Island, British Columbia. 
Range. Port Rupert, British Columbia, to Puget Sound. 
Odostomia cookeana Bartsch, 1912 
Nautilus , 23:138; PI. 11, fig. 7. 
Shell elongate-ovate, very narrowly umbilicated, yellowish-white. 
Nuclear whorls very obliquely immersed in the first of the succeeding turns. 
Post-nuclear whorls very high between the sutures where they are very 
moderately rounded and marked by rather strong incremental lines and 
very numerous fine spiral striations. Periphery and the base of the last 
whorl somewhat inflated, the latter strongly rounded and marked like the 
spire. Aperture large, oval; posterior angle acute; outer lip thin; colu¬ 
mella decidedly oblique, quite strongly curved in the middle and some¬ 
what reflected, provided with an oblique fold at its insertion which is 
strong within and tapers to a vanishing point at the free edge of the colu¬ 
mella; parietal wall glazed with a thin callus. Length, 3.2; diameter, 
2.0 mm. (Bartsch.) 
Type in United States National Museum, No. 208427. Type locality, 
Ellamar, Alaska. 
Range. Known only from type locality. 
Odostomia cypria Dali and Bartsch, 1910 
Plate 61, fig. 4 
Proceedings of the United States National Museum, 42:282; PI. 37, fig. 9. 
Shell of medium size, narrowly elongate-ovate, umbilicated, yellowish- 
white. (Nuclear whorls decollated.) Post-nuclear whorls rather high 
between the sutures, moderately rounded, very feebly shouldered at the 
summit, marked by fine lines of growth and numerous, exceedingly fine, 
closely spaced, spiral striations. Sutures very slightly constricted. Periph¬ 
ery of the last whorl very rounded. Base moderately long, well-rounded, 
narrowly umbilicated. Aperture broadly oval, effuse anteriorly; posterior 
angle obtuse; outer lip thin; inner lip very oblique, slightly curved and 
revolute, not appressed to the base, provided with a very deep-seated, 
feeble fold at its insertion; parietal wall covered with a thick callus, which 
renders the peritreme complete. Length, 4; diameter, 2 mm. (Dali and 
Bartsch.) 
Type in Geological Survey, Canada. Type locality, Skidegate, Queen 
Charlotte Islands, British Columbia. 
Range. Known only from type locality. 
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