196 HELIX-PSEUDIBERUS. 



periphery ; aperture semilunate ; peristome reflected on outer mar- 

 gin, and thickening toward columellar which is oblique. 

 Size, maj. diam. 20'0, min. 15'8 ; alt. axis 7'75mill. (G.-A.) 



Labuan (Sir H. Low, in Coll. Dr. Hungerford). 



Helix (jEgista) pudica G.-A., P. Z. S. 1891, p. 43, t. 2, f. 7. 



H. KOBENSIS Schmacker & Boettger. PI. 52, figs. 61, 62. 

 Allied to H. friedeliana v. Mts. of Liu-Siu Islands, differing in 

 being more solid, umbilicus much wider, the 6 whorls not at all 

 scaly; aperture much smaller, ovate instead of circular, margins 

 thickly white-lipped, the upper less arcuate. Umbilicus about f the 

 width of the shell (being about i in friedeliana). Subconoid 

 depressed, rather solid, uniform horny-olive. Spire low, depressed 

 conic convex, the apex rather obtuse. Whorls 6, slightly convex, 

 separated by an impressed suture, obliquely striated, hardly squam- 

 iferous, the last whorl somewhat more convex below, the periphery 

 not angled at its origin, entirely rounded, slowly descending in 

 front. Aperture small, very oblique, ovate, wider than high ; 

 peristome thickened, expanded and reflexed, white, margins con- 

 verging, the upper sloping, little arcuate. 

 Alt. 6-7*, diam. 13i-15J mill. 



Kobe, Niphon, Japan. 



Helix (Aegista] Jcobensis S. & B., Nachr.-bl. d. d. Mai. Ges. 1890, 

 p. 135. 



Section PSEUDIBERUS Ancey (Vol. IV, p. 58). 



The following probably belong here, although they differ from H. 

 tectumsinense in being thin and corneous. 



H. MARIELLA H. Adams. PI. 55, fig. 23. 



Shell openly umbilicated, depressed lens-shaped, thin, subarcuately 

 irregularly rugose striate, and under a lens very minutely granula- 

 ted ; pale tawny. Spine a little convex ; suture margined. Whorls 4 , 

 the last shortly descending, carinated, the carina acute and com- 

 pressed, whitish ; base more convex ; umbilicus moderate, deep. 

 Aperature very oblique, angulate oval ; peristome expanded, 

 whitish, the margins close, joined by a thin arcuate callus, the 

 basal margin slightly thickened. 



Alt. 7, greater diam. 18, lesser 16 mill. (H. Ad.). 



Itchang and Fungsiang Gorges, Yangtze River, China. 



