HELIX. 147 



upright tubercle, upper lip tooth in the middle of the outer lip, 

 larger and inflected ; lip covering the umbilicus ; light horn color. 

 Diam. 11 mill. 



Western Pennsylvania to Michigan, Southwards to Texas. 



H. clausa, Raf. is a synonym. 



H. RUGELI, Shuttlew. PL 30, figs. 20, 21. 



Whorls 5ij, narrow, rather smooth, the last very much contracted 

 in the centre behind the lip ; aperture small, with a prominent, bent, 

 oblique parietal tooth, a small upright, tubercular basal tooth, and 

 an upper lip tooth, lamellar, farther within the aperture; base 

 convex, with covered umbilicus; light horn color. 



Diam. 10-13 mill. 



Tennessee) No. Carolina. 



Easily distinguished from H. inflecta by its deep-seated upper 

 lip-tooth. 



H. PERSONATA, Lam. PI. 30, figs. 25-27. 



Umbilicus nearly covered, corneous, opaque, pubescent; whorls 

 5, a little convex, the last constricted in front ; aperture angularly 

 trisinuate, lip widely reflected, bidentate, the extremities almost 

 joined by a tongue-shaped parietal tooth. Diam. 11 mill. 



Middle Europe. 



H. isognomostomos, Gmel. (in part) is a synonym. 



H. SUBPERSONATA, Middendorff. PL 30, figs. 17-19. 



Covered perforate, opaque, pubescent; w r horls 5, scarcely convex, 

 the last gibbous above at the aperture, laterally slightly constricted ; 

 lip reflected, callous within, bidentate, the teeth minute, equal,, 

 parietal wall w r ith a tongue-shaped oblique tooth. 

 Diam. 7 mill. 



Siberia*. 

 Subsection III, XOLOTREMA, Raf. 1819. 



H. PALLIATA, Say. PL 30, figs. 30-32. 



Imperforate, light to dark horn color or brownish, with elevated 

 oblique ribs, epidermis rugose, with close, minute, hispid prominences ;. 

 whorls 5, not very convex, with subangulated periphery; aperture 

 trilobate, parietal tooth large, oblique, the basal tooth blade-shaped. 



Diam. 23 mill. 



Appalachian Mts. and westward, Vermont to Tennessee and Iowa. 

 H. denotata, Fer., H. notata, Desh. and H. Carolinensis, Lea. are 

 synonyms. 



