WEST AMERICAN PYRAMIDELLID MOLLUSKS. 215 



ODOSTOMIA (EVALEA) BARANOFFENSIS, new species. 

 Plate 25, fig. 3. 



Shell elongate-ovate, rather stout, yellowish-white. Nuclear 

 whorls obliquely immersed in the first of the succeeding turns, the 

 outer edge of the last turn only being visible. Post-nuclear whorls 

 well rounded, with a narrow, tabulate shoulder at the summit. 

 Suture rendered subchanneled by the shoulder at the summit of the 

 whorls. Periphery and base of the last whorl inflated, well rounded, 

 the latter with a depressed pit, but no perforation in the umbilical 

 area. Entire surface marked by lines of growth and very fine spiral 

 striations. Aperture ear-shaped; posterior angle obtuse; outer lip 

 thick within, thin at the edge; columella very stout, twisted and 

 obliquely revolute, armed with a thick oblique fold opposite the 

 umbilical chink; parietal wall covered by a thin callus. 



The type (Cat. no. 204011, U.S.N.M.) has six post-nuclear whorls 

 and measures: Length 6.3 mm., diameter 2.8 mm. It and two addi- 

 tional specimens were collected by Mrs. Kate Stephens at Bear Bay, 

 Peril Straits, Baranoff Island, Alaska. Two additional specimens 

 were obtained by the same collector at Mole Harbor, Admiralty 

 Island, Alaska; one of them forms Cat. no. 204012, U.S.N.M. 



ODOSTOMIA (EVALEA) SITKAENSIS Clessin. 



Plate 2«, fig. 3. 



Odostomia sitkaensis Clessin, Martini Chemnitz Conch. Cab., 2d ed., Pyrami- 

 dellida?, 1900, p. 121, vol. 30, fig. 1. Odostomia (Evalea) sitkaensis Clessin, 

 Dall and Bartsch, Proc. U. S. Nat. Mas., vol. 33, 1906, p. 360, pi. 17, fig. 8. 



Shell elongate-conic, very regular in outline, yellowish white, shin- 

 ing. Nuclear whorls almost completely immersed in the first of the 

 succeeding volutions. Post-nuclear whorls moderately rounded, 

 rather high between the sutures, slightly shouldered at the summits, 

 marked by many fine lines of growth and numerous fine wavy spiral 

 striations; the latter are more regularly developed and distributed 

 than the lines of growth. (Our figure does not show the spiral mark- 

 ings.) The periphery of the last whorl marks the greatest diameter 

 of the shell. The base, though rather long, falls off rather abruptly 

 at the periphery, then tapers gradually to the anterior end of the 

 columella; it is marked like the spaces between the sutures. Aper- 

 ture large, oval; posterior angle acute, outer lip decidedly curved, 

 almost patulous, tliin; columella long, slender, gently curved, and 

 somewhat reflected, provided with a moderately strong, oblique fold 

 near its insertion; parietal wall without callus. 



The Berlin collection contains two specimens of this species. No, 

 26232, which were collected by F. Schmidt, at Sitka, Alaska. We 

 have described and figured the most perfect of the two, which we 



