N0.1574. WEST AMERICAN PYRAMIDELLID.E—DALL AND BARTSCH. 525 



ODOSTOMIA (EVALEA) COLUMBIANA, new species. 

 Plate XLVII, fig. 9. 



Shell larg-e, elongate-conic, white. Nuclear whorls small, vitreous, 

 planorboid, deeply obliquel}^ immersed in the first of the succeeding- 

 turns, above which only the tilted edge of the last volution is visible. 

 Post-Tuiclear whorls increasing regularly in size, well rounded, very 

 narrowly roundly shouldered at the summits, which renders the sut- 

 ures well marked. Periphery of the last whorl somewhat inflated. 

 Base well rounded, attenuated anteriorly to reenforce the cokniiella. 

 Entire surface covered by numerous somewhat wavy, subequal and 

 subequally closely placed spiral lirations. of which about 40 occur 

 between the summit and the periphery and about an equal number on 

 the base of the last whorl. Aperture large, decidedly patulous ante 

 riorly; posterior angle acute; outer lip thin at the edge, very thick 

 within; columella curved and strongly reflected, free only at its ante- 

 rior extremity, provided with a strong oblique fold at its insertion. 



The type and 5 specimens (Cat. No. 126658, U.S.N.M.) were col- 

 lected by Dr. C. F. Newcombe at Victoria, Vancouver Island, British 

 Columbia. It has 6 post-nuclear whorls and measures: Length 8. 3 mm., 

 diameter •!. 2 mm. Three other specimens (Cat. No. 196245, U.S.N.M.) 

 were dredged by the Bureau of Fisheries steamer Albatross at Station 

 No. 4213, off Port Townsend, Washington, in 23 to 25 fathoms, gray 

 sand and broken shell, bottom temperature 51'-'. Another (Cat. No. 

 196246, U.S.N.M) at Station No. 4203, at Fort Rupert, Vancouver 

 Island, British Columbia, in 25 to 30 fathoms, volcanic sand and gravel 

 and broken shell and sponge, bottom temperature 49.1^. 



ODOSTOMIA (EVALEA) DEHCIOSA, new species. 

 Plate XLVII, fig. 5. 



Shell small, elongate-conic, translucent to milk-white. Nuclear 

 whorls small, deeply immersed in the first of the succeeding turns 

 above which only a portion of the last turn is visible. Post-nuclear 

 whorls moderately rounded, very weakly roundly shouldered at the 

 summit, separated by strongly marked sutures; a narrow band appears 

 aljout the summit showing its junction with the preceding turn. 

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

 Entire surface of base and spire marked by very fine lines of growth 

 and numerous microscopic wavy spiral striations. Aperture rather 

 large, somewhat effuse anteriorly; posterior angle acute; outer lip 

 thin; columella rather stout, strongly curved, and revolute, reenforced 

 by the attenuated base, and covered with a strong fold at its insertion. 

 This fold can be seen through the transparent shell as a quite strong 

 lamella on the pillar of the turns. 



