120 INVERTEBRATE PALEONTOLOGY. [WHITE. 



Genus HELIX Linnaeus. 



Helix Kanabensis (sp. nov.). Shell having the general external shape 

 and character of H. palliata Say, but, besides being considerably smaller, it 

 presents some differences in its aperture. Like that species, its lip is re- 

 flexed, and it has a similar large tooth upon its parietal wall. In addition 

 to the latter there are four short linear ridges upon the inner surface just 

 within the upper and outer portion of the aperture, at the margin of which 

 they terminate exteriorly, but extend inward in the direction of the whorl 

 from two to three millimeters. The lowermost of these small ridges is 

 shortest, but more prominent and tooth-like than the others. Only a single 

 specimen was obtained, and that is very imperfect. It is described and 

 named here because of its value as showing the great differentiation of 

 Helecine types 30 early AS the Cretaceous period. 



Position and locality. Point of Rocks Group; Upper Kanab, Utah. 



Genus ANCHURA Conrad. 



Anclmra ruida (sp. nov.). Shell rather small ; spire moderately elon- 

 gate ; volutions about seven, convex ; suture impressed ; wing moderately 

 large, contorted, bearing at its extero-posterior corner a falciform process 

 which points backward in the direction of the spire ; the outer border of 

 this process and also that of the body of the wing continuously and broadly 

 rounded to the extero-anterior corner of the wing, which is abruptly 

 rounded ; thence the anterior border of the wing extends nearly straight 

 inward to a somewhat broad curved sinus adjacent to the columella, which 

 sinus corresponds to the anterior canal in other species; inner border of the 

 falciform process broadly concave ; and between that process and the spire 

 the distal border of the wing is shortly concave and a little reflexed, sug- 

 gestive of a broad posterior canal, especially as the anterror canal is more 

 than usually broad; inner lip provided with a distinct callus, which in some 

 cases at least extends beyond the distal end of the aperture across the next 

 volution ; columella not much produced in front ; volutions of the spire 

 marked by many longitudinally oblique folds, which extend to the suture 

 on the proximal side of the volutions, but not much beyond the middle on 

 the distal side, and do not appear at all on the body volution or wing. 



