224 BULLETIN 68, UNITED STATES NATIONAL MUSEUM. 



moderately large, ovate, posterior angle obtuse; outer lip thin; 

 columella strongly curved and somewhat reflected, provided with a 

 strong fold a little posterior to its insertion; parietal wall covered 

 with a thin callus. 



The type (Cat. no. 206929, U.S.N.IM.) comes from Santa Rosa 

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

 7.7 mm., diameter 3.S mm. 



ODOSTOMIA (AMAURA) GOULDI Carpenter. 



Plate 27, fig. 2. 



Odostomia (Amaura) gouldii (Carpenter) Dall and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 33, 1907, pp. 531, 532, pi. 48, fig. 4. Odostomia {? y&r .) gouldii 

 Carpenter, Ann. Mag. Nat. Hist., 3d ser., vol. 15, 1865, p. 29. 



Shell of medium size, elongate-conic, yellowish-white, the exterior 

 surface marked by irregular tumescences, giving it a much worn ap- 

 pearance. Nuclear whorls three, deeply immersed, having their axis 

 at about a right angle to the axis of the succeeding turns. Post- 

 nuclear whorls moderately well rounded, faintly shouldered at the 

 summit. Sutures simple, well marked. Periphery and base of the 

 last whorl well rounded, the latter somewhat elongated. Umbilicus 

 faint. Aperture quite large, pyriform, posterior angle obtuse, outer 

 lip moderately thick; columella very oblique, fairly strong, revolute, 

 with a strong fold somewhat anterior to its insertion; parietal wall 

 covered with a fairly strong callus. 



The type (Cat. no. 22821, U.S.N.M.) comes from Neah Bay, Wash- 

 ington. It has six post-nuclear whorls, and measures: Length 6.1 

 mm., diameter 3.1 mm. 



ODOSTOMIA (AMAURA) ARCTICA, new species. 



Plate 28, fig. 5. 



Shell large, elongate-ovate, straw yellow. (Nuclear whorls decol- 

 lated.) Post-nuclear turns well rounded, with subtabulate summits, 

 marked by lines of growth and numerous fine, closely-placed, wavy, 

 spiral striations. Periphery well rounded. Suture well impressed. 

 Base rather elongated, marked like the space between the sutures. 

 Aperture pear-shaped, rather narrow posteriori}- , and somewhat 

 effuse anteriorly, posterior angle rendered obtuse by the tabulation; 

 outer lip thin; columella short, curved, slightly reflected, reenforced 

 by the attenuated base and provided with a weak fold at its inser- 

 tion; parietal wall covered by a thin translucent callus. 



The type has lost the early whorls; the last four and one-half 

 only remain, which measure: Length 12.4 mm., diameter 6.5 mm. 



It and another specimen are entered as Cat. no. 168766, U.S.N.M., 

 and were coflected at U. S. Fish Commission station 3305, southwest 

 of Hagemeister Island, Bermg Sea, in 23 fathoms, at a bottom 



