170 HELIX. 



Var ASIATICA, Nevill. 



Larger than Var. costata, and more distinctly subangulated on 



the base, around the umbilicus. 



Eastern Turkestan. 

 Var. LADACENSIS, Nevill. 



Umbilicus finer, with closer, finer sculpture than Var. costata, 

 aperture higher and more expanded, columella less oblique, base 

 scarcely at all angular around the umbilicus, spire flatter, suture 

 more excavated. Diam. 3*25 mill. 



Eastern Turkestan, Western Thibet. 



Nevill describes this as a doubtfully distinct species. 



H. TENUILABRIS, Braun. PI. 38, figs. 16, 17. 



Differs from H. pulchella in having a higher spire, sometimes 

 with acute apex, whorls 4J, the last scarcely dilated in front, peris- 

 tome very shortly reflected, the aperture lower, etc. 



Diam. 2'5-2'75 mill. 



Sweden, Arctic Europe. 

 H. adela, Westerl, is a synonym. 



H. PULCHELLULA, Heude. PI. 38, figs. 18-20. 



Whitish, rather widely umbilicated, conspicuously plicate-striate - 

 whorls 3, the last rapidly enlarging, a little descending in front : 

 peristome reflected, the extremities approaching. 



Diam. 2%5 mill. 



Shanghai and Mts. of Ningkonofou, China- 



The oblique aperture, and wide umbilicus will distinguish it. 



H. TENERA and H. PATENS, Reinh. Unfigured. Japan. 



Group VII. HELICELLA, Fer. 1819. 



Section I. FRUTICICOLA, Held. 1837. 

 Subsection I. PETASIA, Moquin-Tandon. 1855. 



H. BIDENS, Chemn. PL 38, figs. 21-23, 27-29. 



Covered perforate, corneous with a pellucid or light colored 

 peripheral band; elegantly costulate-striate above; whorls 6-7, 

 scarcely convex; aperture white or red lipped, the basal margin 

 bidentate within, with corresponding external pits. 



Diam. 9 mill. 



Prance, Germany, Sweden, etc. 



H. bidentata, Gmel., H.fufaa, Beck, are synonyms. 



