IIKUX. 147 



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

 larger and inflected ; lip covering I lie u in hi liens; light horn color. 



Diani. I I mill. 



Western Pennsylvania to Michigan, Southwards to Texas. 



H. clausa, Raf. is a synonym. 



II. RTOELI, Shuttle*. PL 30, figs. 20, 21. 



\\ r horls r>.], narrow, rather smooth, the last very much contracted 

 in the eenlre hehiiid the lip ; a pert n re small, wit h a prominent, bent, 

 oblique parietal tooth, a small upright, 1 ubercnlar hasal tooth, and 

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

 convex, with covered umbilicus; light horn color. 



Diam. l()-i:: mill. 



Tennessee, No. Carolina. 



Kasily distinguished from //. infleda by its deep-seated upper 

 lip-tooth. 



II. PERSONATA, Lam. IM. .'!<, figs. 25-27. 



I mbilicus nearly covered, corneous, opaque, pubescent; whorls 

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

 Insinuate, 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. 



II. BUBPER80NATA, Middendorff. PL 30, figs. 17-19. 



Covered perforate, opaque, pubescent; whorls ;1, scarcely convex,, 

 the last gibbous ahove jit the aperture, laterally slightly constricted; 

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

 parietal wall with a tongn< '-.shaped oblique tooth. 

 I )iam. 7 mill. 



Siberia* 

 Sub.M-ci.ion III, XOLOTREMA, Raf. 1819. 



H. I'ALUATA, 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 f), not very convex, with subangulated periphery; aperture: 

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



Diam. 23 mill. 



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



H. denotata, Fer., II. n<>f<tf</, Desh. and H. Carolinensis, Lea. are 

 synonyms. 



