OF CONCHOLOGY. 



59 



7. Stenotrema Edgariana, Lea. 



Plate 9, figure 27. 



Shell somewhat lenticular ; spire depressed trochiform. suture 

 distinct ; whorls 5, flattened above, periphery carinate, the base 

 convex, imperforate ; aperture narrowly transverse, the outer 

 lip notched in the middle, the parietal lip with a long blade- 

 shaped tooth. Dark brown, hairy when fresh. 



Diam. 10, alt. 5 mill. 



Cumberland Mountains, Tennessee. 



Smaller, more elevated, and more convex beneath, than S. 

 spinosa. The parietal tooth most resembles that of jS. steno- 

 trema, while the form of that of *S'. spinosa is more like that of 

 hirsuta. Another difference is in the suture, which, in the 

 present species, is well marked. 



§§ Elevated Species. 



8. Stenotrema Edwardsii, Bland. 



Plate 9, figure 34. 



Lenticular, imperforate, carinate, obsolete near the aperture, 

 rather thin ; spire slightly convex ; whorls 5, narrow, slowly in- 

 creasing, with flat or erect bristles on the epidermis, or their 

 scars when denuded of them ; base very convex, but slightly in- 

 dented around the axis, with impressed spiral lines under the 

 epidermis ; aperture narrow, transverse, with a narrow, slightly- 

 curved, blade-shaped parietal tooth, upper margin of the lip 

 scarcely reflected, basal portion reflected a little, and appressed 

 partially to the body whorl, with a tooth-like callus within, and 

 an almost obsolete central notch. Dark brown. 



Diam. 9, alt. 5 mill. 



Mountains in Fayette, or Green Brier County, Virginia. 



This shell differs from S. hirsuta in its angulated periphery, 

 and less distinct notch in the lip. 



9. Stenotrema labrosa, Bland. 



Plate 9, figure 25. 



Shell imperforate, lenticular, carinated, solid, finely obliquely 

 striate, epidermis thin, with prostrate hairs when fresh ; spire 



