206 HELIX-CAM^NA. 



the zone. Umbilicus like that of hainanensis not wholly covered by 

 the reflexed columellar lip. Alt. 29, diam. 35 mill. 



Habitat unknown. 



H. XANTHODERMA Mollendorff. PI. 26, figs. 1, 2. 



Shell dextral, imperforate, depressed-globose, broad, yellow or 

 greenish-yellow, with a narrow, blackish-brown band at the periph- 

 ery, and another encircling the axis, partly concealed by the callus 

 of the columella. 



The shell is depressed with conoidal spire; strong and solid, 

 slightly shining, closely, finely corrugated all over by oblique wrink- 

 les. The apex is blunt, nuclear whorl light corneous in color, with 

 arcuate radiating striae seen only under a lens. Whorls 5, a trifle 

 convex, slowly widening, the suture at first linear and superficial, 

 becoming impressed ; last whorl convex, descending only a trifle 

 (about one millim.) anteriorly. Aperture oblique, bluish -white in- 

 side and showing the band, which is continued to the edge of the 

 lip ; peristome expanded, suddenly dilated near the columellar in- 

 sertion, reflexed and completely adnate over the umbilical tract, 

 which is covered by a shining callus ; parietal wall covered by a 

 translucent wash of callus. 



Alt. 40, greater diam. 49 mill. 



Alt. 43, greater diam. 50, lesser 43 mill. 



Alt. 40, greater diam. 44, lesser 37 mill. 



Ma-an-shan Mts., province of Guang-dung ; smaller form on the 

 island of Hongkong, China. 



Helix f (an Cochlostyla ) xanthoderma O. von MOLLENDORFF, 

 Jahrb. D. M. Gesell. ix, p. 185, 1882 ; loc. cit. 1884, p. 375, t. 7, f. 

 1, 2 ; and var. polyzona MLLDFF. loc. cit., p. 378, t. 8, f. 1, 2. 



A handsome shell, less elevated than H. hainanensis, larger and 

 wholly imperforate. 



The following variations are noted by Mollendorff. I translate 

 his words : 



1. Specimens from Lofoushan ; form as in typical xanthoderma, 

 but with many bands. 



2. Specimens from Da-peng-tsheng ; also banded, but higher, not 

 attaining the altitude of H. hainanensis. 



