10 HELIX-STEGODERA. 



brown, minutely roughened at the apex, with long, spirally disposed,, 

 sparse, tubercles on the whorls ; aperture very oblique, with two 

 external sulci, dentate above and below ; upper sulcus arcuate, 

 almost equaling the diameter of the disc, the columellar excavated 

 into the umbilicus, both appearing as palatal lamella inside; peristome 

 thin, narrow, reflexed, continuous, nearly free; umbilicus open^ 

 conic. (Heude.} 



Alt. 9, greater diam. 22, lesser 17 mill. 



Tchen-K'eou, China* 



H. bisealpta HEUDE, Moll. Vallee Fleuve Bleu, p. 113, t. 29, f. 10. 



May be hairy when perfect ; described from specimens in bad 

 condition. The pit behind the baso-columellar lip is not represented 

 in fig. 25. It is formed about as in H. horrida Pfr. 



This species and the following seem to be nearer to U. horrida 

 Pfr. than to H. triscalpta Mart. 



H. FABEBJANA Mollendorff. 



Shell rather openly umbilicate, discoidal, solid, minutely granu- 

 lated with transverse stria? and spiral lines, in the young with rather 

 long, sparse hairs ; purplish-brown ; spire plane, apex scarcely 

 projecting ; whorls 5, nearly flat, the last flat above, obtusely angula- 

 ted, inflated beneath, gibbous, a little distorted, obtusely angled around 

 the umbilicus, and with two impressions near the aperture, the basal 

 short, the upper one longer, forming lamella within ; shortly deflexed 

 anteriorly. Aperture very oblique, cordiform ; peristome broadly 

 expanded, labiate, a little reflexed, the margins remote, scarcely^ 

 joined by a callus, outer margin sinuous, basal dentate. (Mlldff?) 



Alt. 7 2, greater diam. 18, lesser 15 mill. 



ML Omi, province Sytsliuan, China^ 



H.faberiana MLLBFF. Nachrichtsbl. D. Mai. Gesell. 1888, p. 40. 



Differs from H. bisealpta Heude in being smaller, the last whorl 

 angular above, peristome scarcely continuous, the scrobiculations or 

 grooves, especially the upper one, shorter, etc. (Mlldff.) 



Section IV. MOELLENDORFFIA Ancey, 1887. 



Mollendorfia ANC. in the Conchologists' Exchange, May, 1887, p.. 

 64. Proctostoma MABILLE, Bull. Soc. Malac. de France iv, p. 102, 

 103, 104, 1887 (Received at Academy of Natural Sciences, Phila.,. 

 Jan. 10, 1888). Polygyra of Gredler and others. 



