200 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
tilted edge of the last volution projects. Post-nuclear whorls inflated, very 
strongly rounded, weakly contracted at the sutures, appressed at the 
summit, marked by numerous, very retractive, lines of growth, and on 
the first three whorls by strongly incised spiral lines, of which 6 occur 
upon the first, 17 upon the second, 25 upon the third whorl between the 
sutures, while on the last whorl they are less strongly expressed and more 
numerous. Periphery and base of the last whorl inflated, well-rounded, 
marked like the space between the sutures of the last whorl. Aperture 
broadly ovate; posterior angle acute; outer lip thin, decidedly expanded 
anteriorly; columella short, strongly curved, revolute, re-enforced by the 
base and provided with a deep-seated fold at its insertion. Length, 6; 
diameter, 3.5 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 206915. Type locality, 
San Pedro, California. 
Range. Known only from type locality. 
Odostomia phanea Dali and Bartsch, 1907 
Plate 63, fig. 5 
Proceedings of the United States National Museum, 33:528; PI. 48, fig. 7. 
Shell elongate-conic, subdiaphanous to milk-white, stout and shining. 
Nuclear whorls small, deeply immersed in the first of the succeeding turns. 
Post-nuclear whorls rather high between the sutures, well-rounded, with 
scarcely an indication of a shoulder at the summit, separated by well- 
marked sutures. Periphery and the rather long base of the last whorl 
well-rounded. The first two whorls are regularly closely spirally striated, 
in the third the striation becomes enfeebled and on the penultimate de¬ 
cidedly obsolete, while the base is smooth. About 18 of the striae are 
visible on the third turn. Aperture large, oval, somewhat effuse anteriorly; 
columella decidedly curved and reflected, re-enforced by the attenuated 
base, provided with a strong oblique fold at its insertion. Length, 4.8; 
diameter, 2.6 mm. (Dali and Bartsch.) 
Type in United States National Museum, No. 46408. Type locality, 
Monterey, California. 
Range. Known only from type locality. 
Odostomia phanella Dali and Bartsch, 1909 
Plate 63, fig. 9 
Bulletin 68, United States National Museum, 205; PI. 23, fig. 9. 
Shell ovate, vitreous, translucent. Nuclear whorls deeply, very obliquely 
immersed in the first of the succeeding turns, above which only the tilted 
edge of the last volution projects. Post-nuclear whorls inflated, slightly 
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