NO. 1574. WEST AMERICAN PYRAMIDELLID-^-DALL AND BARTSCH. 531 



somewhat elongated. Aperture laroe. ovate, somewhat effuse ante- 

 riorl3\ milk-white witliiu; posterior angle acute; outer lip thin at the 

 edge, thieli within; columella short curved, reenforced partly hy the 

 attenuated base, having a strong oblique fold at its insertion; parietal 

 wall covered by a moderately strong callus. 



The type (Cat. No. lo517/>, U.S.N.M.) comes from Xeah Bay. Wash- 

 ington. It has 5 post-nuclear whorls and measures: Length 8.3 mm., 

 diameter 4.3 nun. 



The present subspecies differs from (K {A.) /nwJ/or//u'.s Carpenter 

 chiefly in having the spire much more elongated. 



ODOSTOMIA i^AMAURAi MONTEREYENSIS, new species. 

 Plate XLVIII, ti<rg. h, 6«f. 



Shell large, .><iniilar in form to <K {A.) n. avtllana: white, shining. 

 Nuclear whorls 3. ludicoid. (juite elevated, deeply innnersed in the tirst 

 of the succeeding whorls, having their axis at a right angle to the axis 

 of the later whorls. Post-nuclear whorls well rounded, with a beveled 

 shoulder at the summits. Sutures well marked, simple. Periphery 

 and base of the last whorl well rounded and inflated, the latter some- 

 what elongated. Aperture subovate, somewhat effuse anteriorly; pos- 

 terior angle acute; outer lip thin at the edge, thick within; columella 

 curved and somewhat revolute, having a prominent oblique fold near its 

 insertion; parietal wall covered by a thin callus. 



The type (Cat. No. 40473. U.S.X.^Nl.) is from ^Monterey, California. 

 It has 6 post-nuclear whorls which measure: Length !t.6 mm., diameter 

 5.1 mm. 



In addition to these others have been named for the University of 

 California from Monterey; for Mr. S. 8. Berry from Vl fathoms off' 

 Del Monte, ^Monterey Bay; for Mrs. Okhun'd from San Pedro, and 

 for ]\Ir. Kelsey from San Diego, California. 



This species resembles O. {A.) n. avelhina Carpenter, but differs 

 markedly from that form by having the sunmiits of the whorls 

 shouldered. 



ODOSTOMIA I AMAURAi GOULDII Carpenter. 



Plate XLVIII, lig. 4. 



Odostomia (? var. ) //oit/c/w Cakpextek, Ann. Ma^:. Xat. Hist., ;>(l ser., XV, 1865, 

 p. 29. " 



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

 surface marked by irregular tumescences, giving it a much worn 

 appearance. Nuclear whorls three, deeply immersed, having their 

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

 nuclear whorls moderateh" well rounded, faintly shouldered at the 



