284 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.42. 



diameter, 2 mm. The young individual which is in Doctor Baker's 

 collection has 3 J whorls and measures: Length, 2.3 mm.; diameter, 

 1.4 mm. 



Named for Mss J. M. Cooke, of San Diego, at the request of Doctor 

 Baker. This species follows Odostomia (Evalea) pratoma in the key. 



ODOSTOMIA (EVALEA) BALDRTOGEiE, new species. 



Plate 38, figs. 1, la. 



Shell very elongate-conic, yellowish- white. Nuclear whorls small, 

 immersed in the first of the succeeding turns, above which only half 

 of the last volution projects. Post-nuclear whorls high between the 

 sutures, appressed at the summit, sHghtly rounded, marked by feeble 

 lines of growth, and many sub-equal and subequally spaced, strongly 

 incised, spiral lines. About 25 of these occur between the sutures of 

 the fourth whorl and about 30 between the summit and the periphery 

 on the penultimate turn. Sutures strongly impressed. Periphery of 

 the last whorl somewhat angulated. Base well rounded, moderately 

 long, marked like the spire. Aperture elongate-oval, slightly effuse 

 anteriorly; posterior angle acute: outer lip decidedly sinuous, bent 

 back at the posterior angle to almost form a notch, thin; inner lip 

 moderately long, obhque, shghtly curved and slightly revolute, pro- 

 vided with a strong fold at its insertion; parietal wall glazed with a 

 thin callus. 



The unique type (Cat. No. 211558, U.S.N.M.) was collected by 

 Mrs. Ehzabeth E. Johnston at San Pedro, California. It has 7 post- 

 nuclear whorls and measures: Length, 5.6 mm.; diameter, 2 mm. 



It is named for Mrs. B. L. Baldridge at the request of Miss E. E. 

 Johnston. 



This species follows Odostomia (Evalea) socorroensis in the key. 



ODOSTOMIA (EVALEA) SKTOEGATENSIS, new species. 



Plate 38, fig. 7. 



SheU elongate-conic, yeUowish-wliite. Nuclear whorls completely 

 immersed in the first of the succeeding turns, above which only half 

 of the last turn projects. Post-nuclear whorls very sHghtly rounded, 

 feebly shouldered at the summit, marked by incised spiral lines, 

 which are much stronger on the first two volutions than on the 

 remaining. Of these lines, 10 appear upon the second turn. On 

 the last, they are reduced to exceedingly fine striations: Sutures 

 moderately constricted. Periphery of the last whorl decidedly in- 

 flated and feebly angulated. Base somewhat prolonged, moder- 

 ately rounded, marked by fine, closely spaced, spiral striations. 

 Aperture large, oval; posterior angle acute; outer lip thin; iimer 

 Up strong, moderately curved, and partly reflected over the base to 

 which it is appressed, provided with a strong fold at its msertion. 



