428 PROCEEDINGS OF THE ACADEMY OF [May, 



P. hirsuta it differs in the following respects : P. altispira is more 

 elevated, the spire being conical, with an additional whorl; the 

 notch in the basal lip is wider, with a well-developed tooth on each 

 side in place of an even edge, and the ' ' fulcrum ' ' is much 

 smaller. These differences are constant in a large series of each 

 examined and, in the absence of intermediate forms, warrant us in 

 giving altispira specific rank. P. altispira is usually larger than 

 the other species. It is densely hirsute or bristly above and below, 

 the bristles erect and standing about as close as in P. hirsuta. 



P. depilata of the Great Smoky range differs from P. altispira 

 chiefly in the shallower notch of the basal lip and the totally divei^se 

 character of the surface. 



Mt. Mitchell, mostly large, 6^x 9 to 9x11 mm., spire lower 

 than in Roan mountain types. Many of the lots are larger shells 

 than at Roan mountain, with the spire less raised. 



P. altispira seems to range along the eastern slope of the moun- 

 tains as far south at least as Swain and Jackson counties, where a 

 small form occurs at Balsam mountain and elsewhere. The region 

 lying between Asheville and these counties is wholly unknown 

 conchologically. Balsam mountain, 5^ whorls, diam. fully 8 mm. 

 Smallest from Jackson county, 5^ whorls, diam. 7 mm. As small 

 as hirsuta, but have the wide notch, small fulcrum and rather harsh 

 or stiff pile of altispira. The character of the bristles separates 

 this small form from magnifwnosa. 



P. altispira was not found at Paint Rock, where it is apparently 

 replaced by P. piliila ; but nearly everywhere else it was found in 

 considerable abundance. The localities comprise Bluff mountain, 

 Mitchell, Cat-tail, Wilson's, Meadow Cove, Tyson's, Ivy river and 

 Bee Tree Cove. 



Polygyra pilula Pilsbry. 



Polygyra hirsuta pilula Pilsbry, Proc. A. N. S. Phila., 1900, p. 132. 



Paint Rock, on both sides of the river. This species was origi- 

 nally described as a variety of Polygyra hirsuta. Its occurrence at 

 Paint Rock was quite imexpected, and gives it a much more ex- 

 tended range than was anticipated when first noticed. This fact 

 and the evident stability of its peculiar characteristics, as shown by 

 the specimens before us, without any apparent tendency to merge 

 into the typical hirsuta, justify us in according to it specific rank. 



