NO. 1574. WEST A ME RICA N P 1 'RA MIDELLID. E—DA LL A ND BA R TSCIL 529 



ODOSTOMIA (AM AURA) KENNERLEYI, new species, 

 riate XLVIII, figs. S, 8rf. 



Shell lar^'e, very thin, broadly conic, umbilicated, yellowish-white; 

 marked by subobsolete, snbequal, and subequally spaced spiral 

 wrinkles, about 15 of which may be seen on the body and base of 

 the last whorl. Iii addition to these wrinkles, many faint, closely- 

 placed spiral and vertical striae are present. Nuclear whorls small, 

 about 2i forming- a depressed spire which is deeply immersed, the axis 

 of which is almost at right angles to the axis of the latter whorls. 

 Post-nuclear whorls very wide, inflated, well rounded, faintly shoul- 

 dered at the summit. Sutures well marked, simple. Periphery and 

 base of the last whorl inflated, well rounded, the latter decidedly con- 

 tracted and narrowly umbilicated. Aperture large, suboval, some- 

 what efl'use anteriorly; posterior angle obtuse; outer lip thin; colu- 

 mella straig'ht, obliijuely inserted, revolute, not reenforced by the 

 base, with an ol)lique weak fold near its insertion; parietal wall 

 apparently without a callus. 



The type (Cat. No.. 150564, U.S.N.M.) was collected by Rev. G. W. 

 Taylor at Nanaimo, British Columbia. It has 6 post-nuclear whorls 

 which measure: Length 10.2 nnn., diameter mm. 



Two other specimens (Cat. No. 44:93,^, U.S.N.M.) were collected by 

 Doctor Kennerley at Puget Sound, Washington, and another (Cat. 

 No. 129121) ]\y Prof. O. B. Johnson, at Seattle, Washington. 



ODOSTOMIA (AM AURA) SATURA Carpenter. 



Plate XLVIII. fifjs. .5, ba. 



= Odostomia satura C.'^rpexter, Ann. Mag. Nat. Hist., od ser., XV, 186.5, p. 29. 

 I var. pup iformis Cahpenteu, Ann. Mag. Nat. Hist., 3d ser., XV, 1865, p. 29. 



Shell of medium size, l)roadly conic, white. Nuclear whorls at least 

 two, forming a depressed spire, the axis of which is almost at a right 

 angle to the axis of the later whorls, and which is deeply, somewhat 

 obli(|uely immersed in the first post-iuiclear turn. Post-nuclear whorls 

 moderately well rounded, faintly shouldered at the suumiit, marked 

 all over by irregular rough, low, tumescenses, which simulate obso- 

 lete vertical ri])s. Sutures simple, well marked. Periphery of the 

 last whorl well rounded. Base quite short, decidedly rounded, and 

 uml)i Heated. LTml)ilicus partly covered by the revolute columella. 

 Aperture large, very broadly oval, somewhat eliuse anteriorly; pos- 

 terior angle obtuse; outer lip thick; columella moderately strong, 

 oblique, decidedly curved, with a decided oblique fold, situated consid- 

 erably anterior to its insertion; parietal wall covered by a fairly thick 

 callus. 



Proc. N. M. vol. xxxiii— 07 34 



