208 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



ture 45°. 9; eighteen specimens were determined for Mr. S. S. Berry 

 from 12 fatlioms off Del Monte, Monterey Bay, California. 



ODOSTOMIA (EVALEA) SOCORROENSIS, new species. 

 Plate 24, fig. 1. 



Shell 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 well 

 rounded, moderately contracted at the sutures, appressed at the 

 summit. Suture strongly impressed. Periphery of the last whorl 

 feebly angulated. Base rather long, slightly rounded. Entire sur- 

 face of spire and base marked by very numerous, closely crowded, 

 exceedingly fine spiral striations. Aperture ovate; posterior angle 

 with a decided notch; outer lip strongly arcuate, thin; columella 

 slender, curved, slightly revolute, provided with a fold at its insertion. 



The type (Cat. no. 153024, U.S.N.M.) and 84 specimens come from 

 Socorro Island, Mexico. The type has six post-nuclear whorls and 

 measures: Length 4.6 mm., diameter 2.2 mm. 



ODOSTOMIA (EVALEA) DONILLA, new species. 



Plate 24, fig. 3. 



Shell broadly conic, bluish-white. Nuclear whorls deeply obliquely 

 immersed in the first of the succeedmg turns, above which only the 

 tilted edge of the last volution projects. Post-nuclear w^horls well 

 rounded, slightly contracted at the suture, appressed at the summit. 

 Periphery of the last whorl angulated. Base slightl}'^ rounded, 

 sloping abruptly from the periphery to the umbilical area. Suture 

 slightly impressed. Entire surface of base and spire marked by 

 numerous almost vertical lines of growth and many well-incised 

 spiral striations. Aperture ovate, slightly effuse anteriorly; posterior 

 angle acute; outer lip thin; columella strongly curved, reflected, 

 reenforced by the base, provided with a strong fold at its insertion. 



The type (Cat. no. 126626, U.S.N.M.) and eight specimens come 

 from San Pedro, California. The type has six post-nuclear whorls 

 and measures: Length 4.5 mm., diameter 2.2 mm. Cat. no. 152324, 

 U.S.N.M., two specimens from Ballast Point, California. Cat. no. 

 46470, U.S.N.M., two specimens from Todos Santos Bay, Lower 

 California. Cat. no. 46497, U.S.N.M., one from the same locality. 

 Eight specimens were identified for Mrs. Oldroyd, from San Pedro 

 Bay, California. 



ODOSTOMIA (EVALEA) CALIFORNICA, new species. 



Plate 24, fig. 2. 



Shell small, broadly conic, bluish- white. Nuclear whorls deeply 

 very obliquely immersed in the first of the succeeding turns, above 

 which only the tilted edge of the last volution projects, the whole 



