58 HELIX. 



With columellar plication. 



H. OONIOCHILA, Pfr. PI. 11, %s. 51, 52. 



Moderately umbilicated, somewhat solid, lightly striulate and 

 granular, subdiaphanous, pale corneous; whorls 6 J, narrow, slightly 

 convex, the last not descending, acutely carinated, base more con- 

 vex ; peristome sublabiate, sulcate exteriorly, columella transversely 

 uni plicate. Diam. 13 mill. 



Siam. 

 H. PTYCHOSTYLA, Mart. PI. 33, figs. 65-67. 



Moderately umbilicated, somewhat solid, striate, brownish ; whorls 

 6J, slightly convex, slowly increasing, the last obtusely carinated, 

 base convex ; peristome white, expanded, columellar margin al- 

 most perpendicular, transversely uniplicate. Diam. 14 mill. 



Siam. 

 H. STYLOPTYCTA, Pfr. PL 11, figs. 49, 50. 



Widely umbilicated, rather solid, closely striulate, diaphanous, 

 greyish corneous ; whorls 6, moderately convex, the last obsoletely 

 angulated, not descending in front ; peristome white-lipped, margins 

 approaching, joined by a callus, expanded above and below, colum- 

 ella transversely plicate. Diam. 9 mill. 



Siam. 



A var. DEPRESSIOR has been indicated. This species is the H. 

 ptychostyla of Pfr., not Martens ; but is perhaps only a variety of 

 Martens' species. 



Subsection PSEUDIBERUS, Ancey. 1887. 



H. PLECTOTROPIS, Martens. PI. 12, figs. 3-5. 



Moderately umbilicated, strongly, distantly, obliquely ribbed, 

 whitish; whorls 5, flattened above, carinate, carina crenulated, 

 angulating the last whorl, slightly descending at the aperture, base 

 a little convex ; peristome expanded, margins approaching, con- 

 nected by a thin callus. Diam. 19 mill. 



Mts. Thianschan, Central Asia. 

 H. SCEPASMA, Pfr. PI. 13, fig. 33. 



Moderately umbilicated, solid, opaque, white, rugulosely striate, 

 suture subimpressed ; whorls 7, scarcely convex, slowly increasing, 

 the last a little descending in front, periphery acutely carinated> 

 base turgid around the umbilicus; peristome subthickened, angu- 

 larly reflected. Diam. 20 mill. 



Hob. unknown. 



