WEST AMERICAN PYRAMIDELLID MOLLUSKS. 197 



ODOSTOMIA (EVALEA) KADIAKENSIS, new species. 

 Plate 22, fi.s;. 9. 



Shell very regularly elongate conic, umbilicated, yellowish white. 

 (Nuclear whorls decollated.) Post-nuclear whorls moderately 

 rounded, marked by vertical lines of growth and numerous, exceed- 

 ingly fine, wav}', spiral striations. Sutures deeply impressed. Pe- 

 riphery of the last well rounded. Base strongly inflated, marked like 

 the spire ; umbilicus narrow, partly covered by the strongly reflected 

 columella. Aperture ovate, effuse anteriorly, posterior angle acute; 

 outer lip thin; columella thin, very oblique, strongly curved ante- 

 riorly and decidedly reflected, provided with a weak fold a little 

 anterior to its insertion. 



The type and another specimen (Cat. no. 159470, U.S.N.M.) were 

 collected by Dr. W. II. Dad at Kadiak Island, Alaska. The type has 

 six post-nuclear whorls and measures: Length 5.2 mm., diameter 



2.7 mm. 



ODOSTOMIA (EVALEA) HERILDA, new species. 

 Plate 23, tig. 8. 



Shell elongate-conic, light yellow. Nuclear whorls deeply obliquely 

 immersed in the first of the succeeding turns. Post-nuclear whorls 

 cylindric in outline, moderately rounded in the middle and very much 

 so at the very strongly shouldered summit. Sutures well impressed. 

 Periphery short, base of the last whorl well rounded, the latter nar- 

 rowly umbilicated. Entire surface of spire and base marked by 

 numerous vertical lines of growth and exceedingly fine, closely spaced, 

 wavy spiral striations. Aperture ovate, posterior angle obtuse; 

 outer lip thin; columella slender, somewdiat sinuous, slightly reflected, 

 provided with a deep-seated fold a little anterior to its insertion; 

 parietal wall glazed with a thin callus. 



The type (Cat. no. 206910, U.S.N.M.) was dredged off San Diego, 

 California. It has six post-nuclear whorls and measures: Length 



3.8 mm., diameter L8 mm. 



ODOSTOMIA (EVALEA) TENUIS Carpenter. 



Plate 22, fig. 3. 



Odostomia tenuis Carpenter, Oat. Mazatlan Shells, 1856, p. 412; not Odostomia 

 tenuis Dall and Bartsch, Mem. Cal. Acad. Sci., vol. 3, 1903, p. 281, pi. 1, 

 fig. 14. 



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

 obliquely immersed. Post-nuclear whorls inflated, well rounded, 

 somewhat overhanging, strongly constricted at the suture. Periph- 

 ery and base of the last whorl somewhat inflated, well rounded, 

 strongly umbilicated. Entire surface of spire and base marked by 



2565— Bull. 6S— 09 14 



