NO. 1903. WEST AMERICAN PYRAMIDELLID MOLLUSKS—BARTSCH. 279 



appearing as cylindrical elements. The whorls are marked by rather 

 strong, incremental lines and by numerous strong, wavy, incised, 

 sph-al stridtions. Periphery and the moderately long base of the last 

 whorl well rounded, marked like the sphe. Aperture large, oval; 

 posj^erior angle decidedly obtuse; outer lip thin; inner lip moderately 

 strong, oblique, somewhat sinuous, slightly reflected, and provided 

 with a fold some little distance anterior to its insertion; parietal wall 

 glazed with a moderately thick callus. 



TJie type (Cat. No. 211557, U.S.N.M.) was dredged at United States 

 Bureau of Fisheries station 4322, in 110 to 199 fathoms, off Pomt 

 La Jolla, California. It has 5 post-nuclear whorls and measures: 

 Tjength, 4.2 mm.; diameter, 2 mm. 



The ])resent species is nearest related to Odostomia (Evdlea) pro- 

 fundicola Dall and Bartsch, from which it differs chiefly in being much 

 stouter and proportionately shorter, in having more strongly tabu- 

 lated shoulders, and in having the surface very strongly, spirally 

 striated, the spiral sculpture in Odostomia (Evdlea) prqfundicola being 

 exceedingly line. 



This species follows Odostomia {Evdlea) thea m the key. 



ODOSTOMIA (EVALEA) CALCARELLA, new species. 



Plate 37, fig. 4. 



Shell very broadly elongate-conic, creamy-white. Nuclear whorls 

 obliquely immersed in the first of the succeeding turns. Post^ 

 nuclear whorls moderately well rounded, slightly shouldered at the 

 summit, marked by decidedly retractive lines of growth and numer- 

 ous, strong, incised, spiral lines. Suture constricted. Periphery 

 of the last whorl subangulated and inflated. Base short, narrowly 

 umbilicated, marked like the spire- Aperture large, somewhat effuse 

 anteriorly; outer lip thin, strongly curved; inner Up slender, decid- 

 edly curved and reflected, provided with a moderately strong fold a 

 little anterior to its msertion. 



The type (Cat. No. 211587, U.S.N.M.) was di-edged by the United 

 States Bureau of Fisheries steamer Albatross, at station 2901, in 48 

 fathoms, off Santa Rosa Island, California. It has 5 post-nuclear 

 whorls and measures: Length, 3.3 mm.; diameter, 1.8 mm. 



This species follows Odostomia {Evdlea) calliope m the key. 



ODOSTOMIA (EVALEA) SPREADBOROUOm Dall and Bartsch. 



Plate 38, fig. 8. 



Odostomia (Evalea) spreadboroiighi Dall and Bartsch, Dep. Mines, Geol. Surv., 

 Canada, 1910, p. 17, pi. 2, fig. 2. 



Shell, elongate-ovate, somewhat translucent, bluish-while. Nuclear 

 whorls small, deeply, very obhquely immersed within the first of 

 the succeeding turns. Post-nuclear whorls inflated, flattened in the 



