NO. 1903. WEfiT AMERICAN PYRAMIDELLID MGLLUSKS—BARTSCH. 281 



ODOSTOMIA (KVALEA) QVADRJE Dall and Bartsch. 



Plate 37, fig. 3. 



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

 1910, pp. 17-18, pi. 2, fig. G. 



Shell, elongate-ovate, milk-wliite, umbilicated. Nuclear whorls 

 deeply, obliquel}' immersed in the first of the i)ost-nuclear turns, 

 above which only the tilted edge of the last volution projects. Post- 

 nuclear whorls moderately rounded, moderately shouldered at the 

 summit, marked by faint, slightly retractive lines of growth, and 

 numerous, exceedingly line, microscopic, spiral striations. In addi- 

 tion to this sculpture, the last whorl shows many weak malleations. 

 Periphery of the last whorl and the moderately long base somewhat 

 inflated, well rounded, marked like the spire. Aperture large, oval; 

 posterior angle acute; outer lip thin; inner lip very oblique, slightly 

 curved and strongly revolute, extending partly over the umbilicus, 

 provided with a moderately strong fold a little anterior to its inser- 

 tion; parietal wall glazed with a thin callus. 



Fifty-three specimens of this species were dredged in 18 to 28 fath- 

 oms at Sliip Channel, Barkley Sound, Vancouver Island, British 

 Columbia. Part of these are in the Geological Survey Museum collec- 

 tion at Ottawa; the remainder are in the United States National 

 Museum collection, Cat. No. 211540. The figured specimen has 6 

 post-nuclear whorls, and measures: Length, 6.2 mm.; diameter, 

 3.2 mm. 



This species follows Odostomia {Evalea) Tcadialcensis in the key. 



ODOSTOMIA (EVALEA) CALLIMENE, new species. 

 Plate 38, fig. 2, 2a. 



Shell elongate-ovate, milk-white. Nuclear whorls small, obUquely 

 immersed in the first of the succeeding turns, above which only half 

 of the last volution projects, the projecting portion extending con- 

 siderably beyond the outline of the post-nuclear spire. Post-nuclear 

 whorls slightly rounded, somewhat constricted at the summit, marked 

 by almost vertical lines of growth and very regular, closely spaced, 

 w&Yj, spiral striations; of the latter about 25 occur between the 

 sutures and the thu-d whorl. Periphery of the last whorl decidedly 

 inflated ; strongly rounded ; base moderately long, well rounded, with 

 a narrow umbihcus, marked like the spire. Sutures moderately im- 

 pressed. Aperture large, shghtly elTuse anteriorly; posterior angle 

 acute; outer lip very thin; inner lip quite long, decidedly flexuose 

 and somewhat reflected, provided with a strong fold opposite the 

 umbilical chink; parietal wall glazed with a tliin callus. 



