1902.] NATURAL SCIENCES OF PHILADELPHIA. 427 



are more nearly allied to the typical form, both in texture and the 

 width of the pei'istome. But in one example this is decidedly 

 reflexed, and in the other the whole shell is strongly tinged with red. 

 They measure 25^ and 26^^ mm. in diameter. There is no evi- 

 dence of any tendency to bands, nor to the development of a parie- 

 tal tooth so characteristic of altivaga, in any of these specimens. 



This form extends as far north as Roan moimtain. Four speci- 

 mens from Roan mountain R. R. Station are as heavy as an ordi- 

 nary P. albolabris, with a broad, thick, flattened or convex lip, and 

 of a decided yellow-horn color. They measure 27|- x 28, 27^ x 22, 

 26 X 19f, 27i X 21 mm., and approach var. altivaga very closely. 

 Polygyra thyroides (Say). 



Paint Rock, north side; Tyson's and Wilson's Coves. Scarce. 

 Polygyra clausa (Say). 



Two specimens only at Paint Rock, ou the south side of the river. 

 Polygyra wheatleyi (Bland). 



This species was found nearly everywhere and usually in abuud- 

 ance. There is no apparent tendency to develop a smaller race on 

 the higher portions of IMitchell as on the peaks of the Smoky 

 mountains, although three-fourths of the specimens from Mitchell 

 and Cat-tail were edentate, while those from Bluff mountain were 

 all dentate and with the outer margin of the lip dark colored. 

 These varied from 13| to 16 mm. in diameter, while those from 

 Mitchell and Cat-tail averaged larger, running from 14^ to 16. 

 Ferriss found it also at Paint Rock, Tyson's, Wilson's, Meadow 

 Cove, Great Craggy, Bee Tree Cove and Toe river. 

 Polygyra stenotrema (Fer.). 



Common ou both sides of the river at Paint Rock. One only 

 from Wilson's Cove. All these have a rather wide lip notch, 

 otherwise typical. 

 Polygyra altispira Pilsbry. 



"Stenotrema hirsutum Say. An elevated, somewhat carinated var- 

 iety," Wetherby, Some "Notes on American Land Shells, No. II, 

 p. 7, No. 33, in Jour. Cmcinnali Soc. N. II., IV. 1881, p. 329. 

 Natural History notes from N. C, No. 2, in Jour. Ciu. Soc., 1894, 

 p. 212. 



Polygyra hirsuta altispira Pilsbry, Nautilus, VII, p. 141 (April, 



This species was first noticed in 1881, by Mr. A. G. Wetherby, 

 as a variety of the widespread P. Jiirsuta Say. Compared with 



