362 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxx. 



slightly reflected edge is separated onl)^ by a narrow line. A strong 

 oblitjue fold, not completely visible when the aperture is viewed 

 scjuarely, is located a little anterior to the insertion of the columella. 

 The type has five post-nuclear whorls and measures: long. 5.3 mm.; 

 diam. 3.1 nnn. Clessin gives the diam. as 1.3, evidentl}'^ a transposi- 

 tion. He also cites the registration No. as 36336, while it should be 

 36335. His figure nlmost rcpi-esents this species. The t3'pe comes 

 from Killisnoo, Alaska, not Japan. 



ODOSTOMIA (AMAURA) KRAUSEI Clessin. 



Plate XXIII, fig. 2. 



Odostomia kraum, Clessix, Mart. Cheiii. Conch. Cab., 2(1 ed., Pyramid., 1900, 

 p. 115, pi. .\ XVIII, fig. 1. 



Shell elongate-conic, thick and heavy, rough through erosion, yel- 

 lowish white. Nuclear whorls decollated in the t>'pe (judging from 

 the i)it in the apex they are probably deeply, obliquely immersed). 

 Post- nuclear whorls only moderatel}' rounded, somewhat shouldered at 

 the summit (surface decidedly eroded). Periphery and base of the last 

 whorl well rounded, the latter with a minute umbilical chink. Aper- 

 ture auricular, somewhat elluse anteriorly, posterior angle scarcel}' 

 acute; outer lip very thick; columella thick, retiexed, with a broad, 

 strong, obli(iue fold, a little anterior to its insertion; parietal wall 

 covered by a thick callus. 



The t^'pe has six post-nuclear whorls and measures: long, 9.H nnn.; 

 diam. 5 mm. It was collected by Krause at Killisnoo, which is in 

 Alaska and not in Japan as stated by (ylessin. The registration num 

 ber of his tj'pe in the Berlin Museum is also wrong; the specimen 

 descril)ed and figured by him is 3633.") and not 36336 r.s given in his 

 account of the species. 



The U. S. National Museum has two lots, one specimen, 159454, 

 from Killisnoo, collected })y Krause, and another. No. 159471. from 

 Kadiak. They are both nuich eroded and can furnish no additional 

 data to our text. 



Clessin's figure cited abov(\ will not (Miable any one to recognize 

 this form. 



ODOSTOMIA (ODOSTOMIA) DESIMANA, new name. 

 Plate XXV, rig. ;{. Plate XXVI, rig. 2. 



Odostomia ladni Dinkkk, INIal. Bliitt., VI, 1860, p. 234; also Moll. .Tap., 1861, 

 p. 17, pi. .\i, rig. 4, not (hioMiimia ladea J. G. Jkffkey.s, Ann. Mag. Nat. 

 Hist., II, 1848, p. 348 { = Tnrho)iUla lactea Linn.elis), nor Odostomia lactea 

 .\xu.\s, Proc. Zool. Soc.,1867, p. 112, pi. xiii. 



Sholl regularly elongate-conic, milk-white. Nuclear whorls small, 

 <»l)li(|iit'ly iilmo.st completely immersed in the first of the succeeding 

 wliorls. only the periphery of the last two being visible. Post-nuclear 



«i 



