WEST AMEEICAN PYRAMIDELLID MOLLUSKS. 213 



whorls moderately rounded, somewhat shouldered at the summit^ 

 marked by fme lines of growth and numerous, very fine, closely spaced 

 spiral striations. Sutures well impressed. Peripher}^ of the last 

 whorl somewhat angulated. Base sloping from the periphery to the 

 umbilical area, but slightly rounded. Aperture ovate; posterior 

 angle obtuse; outer lip fractured; columella short, strong, curved, 

 and revolute, provided with a strong fold at its insertion; parietal 

 wall covered with a weak callus. 



The type (Cat. no. 44, State Museum, Albany, New York (original 

 no. 24), A 31, 10) was collected at Santa Barbara, California. It has 

 seven post-nuclear whorls and measures: Length 6.6 mm., diameter 

 3 mm. 



ODOSTOMIA (EVALEA) NOTILLA, new species. 



Plate 25, fig. G. 



Shell very elongate, ovate, yellowish-white. 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, feebly contracted at the sutures, nar- 

 rowly subtabulately shouldered at the summit. Suture strongly 

 marked. Periphery of the last whorl marked by a low raised cord, 

 which renders it decidedly angulated. Base short, well rounded, 

 somewhat pinched in at the umbilical area. Entire surface of spire 

 and base marked by almost vertical lines of growth and numerous 

 very fme, well incised, spiral striations. Aperture ovate, posterior 

 angle acute; outer lip thin; columella slender, slightly curved, pro- 

 vided with a fold at its insertion; parietal wall covered with a thick 

 callus. 



The type (Cat. no. 206921, U.S.N.M.) was dredged by the Uni- 

 versity of California, at station 30, off Catalina Island, California. 

 It has five post-nuclear whorls and measures: Length 2.7 mm., diam- 

 eter 1.3 mm. The topotype is in the University of California. 



ODOSTOMIA (EVALEA) MOVILLA, new species, 

 Plate 25, fig. 1. 



Shell elongate-ovate, white. 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 feebly 

 rounded in the middle, strongly so at the slopingly shouldered sum- 

 mit, and moderately contracted at the suture. Periphery weakly 

 angulated. Base rather long, moderately rounded, sloping gently 

 from the periphery to the umbilical area. Suture well impressed. 

 Entire surface of spire and base marked by fine retractive lines of 

 growth and numerous very fine closely spaced wavy spiral striations. 

 Aperture broadly oval, posterior angle obtuse; outer lip thin; col- 

 2565— Bull. 68—09 15 



