20 2 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
growth and exceedingly fine microscopic, closely spaced, spiral striations. 
Aperture very large, ovate; posterior angle obtuse; outer lip thin; colum¬ 
ella slender, somewhat twisted, oblique, slightly revolute, provided with a 
deep-seated fold. Length, 4.5; diameter, 2 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 206924. Type locality, 
United States Bureau of Fisheries Station 2963, in 359 fathoms, off San 
Diego, California. 
Range. Point Vincente to San Diego, California, deep water. 
Odostomia quadrae Dali and Bartsch, 1910 
Canada Department of Mines, Geological Survey Branch, Memoir No. 14N: 17; PI. 
2, fig. 6. 
Shell elongate-ovate, milk-white, umbilicated. Nuclear whorls deeply, 
obliquely immersed in the first of the post-nuclear turns, above which only 
the tilted edge of the last volution projects. Post-nuclear whorls moder¬ 
ately rounded, moderately shouldered at the summit, marked by faint, 
slightly retractive lines of growth, and numerous, exceedingly fine, micro¬ 
scopic, spiral striations. In addition to this sculpture, the last whorl 
shows many weak malleations. Periphery of the last whorl and the 
moderately long base somewhat inflated, well-rounded, marked like the 
spire. Aperture large, oval; posterior angle acute; outer lip thin; colu¬ 
mella very oblique, slightly curved and strongly revolute, extending partly 
over the umbilicus, provided with a moderately strong fold a little anterior 
to its insertion; parietal wall glazed with a thin callus. Length, 6.2; 
diameter, 3.2 mm. (Dali and Bartsch.) 
Type in Geological Survey Museum, Ottawa; specimens in United 
States National Museum, No. 211540. Type locality, ship channel, Barkley 
Sound, Vancouver Island, British Columbia. 
Range. Known only from type locality. 
Odostomia raymondi Dali and Bartsch, 1909 
Plate 60, fig. 9 
Bulletin 68 , United States National Museum, 212; PI. 25, fig. 9. 
Shell regularly conic, milk-white. Nuclear whorls very obliquely 
deeply immersed in the first of the succeeding turns, above which only 
the tilted edge of the last volution projects, which gives the spire a 
decidedly truncated aspect. Post-nuclear whorls well-rounded, slightly 
shouldered at the summit, marked by a raised spiral thread at the decidedly 
angulated periphery. The summits of the whorls fall a little anterior to 
the periphery, and cause the sutures to appear subchanneled. Base short, 
well-rounded. Entire surface of base and spire marked by strongly 
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