66 COLORADO COLLEGE STUDIES. 



tion of the labial region. Angle of slopes of spire a little less 

 than 90 def^rees. 



Occurrence. — In Nos. 3-4 of the Belvidere section of the 

 Kiowa shales, near Belvidere, Kansas. I have seen bnt one 

 specimen. 



This shell bears a striking resemblance in form to that of^ 

 V. anibigua as figured by Meek in Vol. IX of the Hayden 

 U. S. Geological Survey, differing from it chiefly by the rela- 

 tively somewhat more elevated body-wliorl and aperture and 

 the smaller size. The surface of the shell is somewhat weather- 

 worn in the type and does not reveal its original sculpture. 



Anchura kiowana, sp. nov. 



Shell small, consisting of six convex whorls; spire elevated; 

 suture impressed; wing of moderate size, consisting of a proxi- 

 mal flange-like part, continued posteriorly across half or more 

 of the first spire- whorl, and a carinated falciform process; 

 carina gradually arising at the base of the falciform process 

 and traversing the latter to the extremity; falciform process 

 much shorter and less upturned distally than that of the 

 somewhat similar species, A. ruj'da, White, not rising to the 

 lowest level of the suture between the body-whorl and the 

 first spire-whorl, but having its point directed outward and 

 somewhat upward, so as to make a large angle with the axis 

 of the spire, extero-inferior outline of wing rounded and the 

 border between this and the canal sinuous, margin of upper 

 (flange) part of wing describing a slightly concave to sigmoid 

 outline and more or less thickened and reflexed; inner lip 

 provided with a moderately broad and prominent callous; 

 canal short and obliquely truncated ; spire-whorls and posterior 

 half to two-thirds of body- whorl ornamented with narrow, 

 curved, subvertical ribs, or folds, of which there are about 

 twenty-four on the first spire-whorl, and with numerous re- 

 volving striae, the latter ornamentation gradually becoming 

 prominent and superseding the ribs on the lower third to half 

 of the body- whorl. 



Measurements. — Height 19, breadth of body-whorl, in- 

 cluding excursion of wing, 15 mm.; angle of spire-slopes 

 about as in A. ruida, White. 



