116 HELIX. 



H. HOLOSERICA, Studer. PI. 23, figs. 75-77. 



Umbilicated, orbicular, depressed, convex below, corneous, thin ; 

 whorls 4, flattened, the last anteriorly constricted and scrobiculate ; 

 aperture trisinuate, the peristome wide, regularly reflected, biden- 

 tate within. Diam. 11-13 mill. 



Alps of Switzerland , Austria, Styria, Carinthia, Silesia. 

 H. diodonstoma, Bourg., is a synonym. 



Var. PLURIDENTATA, Pollonera. 



Aperture quadridentate, the two supplementary teeth are, one in 

 the superior angle, the other smaller and more external, in the 

 inferior angle of the columella. 



PiedmonL 



H. TRIARIA, Frivaldsky. PI. 23, figs. 78-80. 



Perspectively umbilicated, corneous, elegantly costulate, spire 

 convex, a little obtuse ; whorls 6, somewhat convex, slowly enlarg- 

 ing, the last angulated above, attenuated below ; aperture sinuous, 

 lip reflected, bidentate within. Diam. 5 mill. 



Transylvania. 



It is H. Ocskayi, Stentz. 



Var. TRINODIS, Kimak. Fig. 80. 



Aperture with three teeth; two on the outer lip, one on the 

 parietal wall. 



Var. Transsylvanica, Hazay, is a synonym. 



Var. TRIADIS, Kimak. 



More conical, with narrower umbilicus, finer sculpture, aperture 

 without teeth or reflected lip. 

 Var. TATRICA, Hazay. 



Lip narrow, whitish, unidentate. 



H. DIODONTA, Muhlfeldt. PL 23, figs. 81-83. 



Widely umbilicated, discoidal, minutely granularly striate, 

 brownish corneous; whorls 4 J, scarcely convex, the last subcari- 

 nate, deflected in front, constricted at the aperture and impressed 

 above ; peristome reflected, reddish with two teeth within on the 

 upper and basal portions. Diam. 11*5 mill. 



Transylvania, Servia. 



H. QUADRASI, Hidalgo. PI. 23, figs. 84-87. 



Widely, perspectiyely umbilicated, thin, granularly hirsute with 

 very short hairs, corneous ; whorls 5, a little convex, narrow, the 



