116 



LAND AND FRESH WATER SHELLS OF N. A. [PART L 



Helix edvardsi, Bland, Ann. N. Y. Lye. VI, 277, pi. ix, f. 14-lG (1858). 



— W. G. BiNNEY, Terr. Moll. IV, 63, pi. Ixxix, f. 7-9.— Pfeiffer, 



Mai. Blatt. 1859, 13. 

 Stenotrema edwardsi, Tryon, Am. Joum. Conch. Ill, 59, pl. ix, f. 34 (1867). 



Mountains of Fayette or Green Briar Co., Yirgrinia. 



This species is allied to or rather intermediate between H. bar- 

 higera and H. hirsuta, Say — ^the former connecting H. sjnnosa 

 with E. fraterna. It is smaller, more elevated, less acutely 

 earinated, and readily distinguished from H. harhigera by the 

 partially appressed, notched peristome, and the different character 

 of the epidermis. In H. harhigera the attached hair-like epi- 

 dermidal processes are produced, at the sutures and carina, into 

 cilia which are entirely wanting in this species. The same pro- 

 cesses, though less numerous, and sometimes almost obsolete, 

 are observable at the base of the former, while in the latter, the 

 basal epidermis approaches in character to that of H. imlliata. 

 The deep characteristic notch in H. hirsuta is considerably less 

 developed in E. edvardsi, and the callus which connects the 

 parietal tooth with the upper margin of the peristome in the 

 former, does not exist in the latter. In the general character 

 of the peristome the species under consideration resembles E. 

 hirsuta, while E. harhigera is in that particular more appropri- 

 ately compared with E. fraterna. Say. 



Fi?. 194. 



Helix Ibarlligera, Eedfield. — Shell imperforate, sharply carinate, 

 rather thin, dark horn-colored or brown ; the upper surface has the epi- 

 dermis raised into acute striae, which at the suture and 

 carina are produced into short cilia or bristles ; these 

 epidermidal striffi are sometimes seen beneath, but less 

 distinctly, being often obsolete in the mature shell ; 

 basal surface convex, but indented in the umbilical 

 region ; spire slightly convex ; whirls five and a half, 

 rather flat, last one suddenly but slightly deflected ; 

 aperture very oblique, transverse, ear-shaped, narrowed 

 by a rather slender, tongue-shaped tooth, which extends 

 nearly across the whole width of the aperture ; peristome callous, margins 

 slightly but distinctly reflected, and thickened within, basal margin 



Helix harhigera, 

 enlarged.' 



' The figure was photographed on wood. 



