12 HELIX-STEGODERA. 



is very scarce. Another locality is on the mainland around Mirs 

 Bay. It is probably distributed throughout the central portions of 

 the province Kwang-tung. 



The nucleus consists of 1 J rather wide, convex but planorboid 

 whorls, which are very delicately microscopically shagreened. The 

 whorl is a little narrowed where the nuclear whorls give place to the 

 post-embryonic growth. The latter has a microscopic granulation 

 and coarse tuberculation as described in the text. 



Var. SCULPTILIS Mollendorff. PI. 1, figs. 23, 24. 



Smaller, the whorls more convex, tuberculation stronger, the gran- 

 ules and tubercles generally whitish. Alt. 8-9, diam. maj. 16-16* 

 mill. 



Lo-fou-shan Mts., back of Canton, China. 



H. EASTLAKEANA Mollendorff. PL 1, figs. 21, 22. 



Shell narrowly unibilicated, depressed-conoidal, with oblique ear- 

 shaped aperture, the peristome free, continuous, basal margin with 

 two teeth. 



Low-conoidal above, convex below, rather thin but opaque, dark 

 reddish-brown, the aperture liver-brown ; surface lusterless, the 

 whorls sculptured with tubercles which form backward directed 

 obliquely descending folds above and below the periphery ; spire 

 rather elevated, conoidal, blunt at apex ; nuclear whorl rather large, 

 planorboid, convex ; suture evenly impressed. Whorls 5J, slowly, 

 regularly widening, the last whorl scarcely wider than the penulti- 

 mate, obtusely carinated, slightly convex below the periphery, slowly 

 descending toward the aperture and then suddenly becoming free 

 from the preceding whorl. There are two pits behind the basal lip, 

 one near the umbilicus, the other near the periphery. Aperture 

 triangular or ear-shaped, the peristome narrowly expanded, contin- 

 uous ; parietal wall elevated, emarginate, obtusely projecting inward ; 

 outer lip with an acute fold where it joins the basal lip ; the latter 

 with a smaller square tooth ; umbilicus narrow, partly concealed by 

 the inner angle of the peristome. 



Alt. 14, greater diam. 20, lesser 18? mill. ; umbilicus 2J mill. wide. 

 Alt. ISi, greater diam. 23 , lesser 21 mill. 



In a ravine of Tai-mo-shan, mainland, opposite Hong-Kong. 



H. eastlakeana MLLDFF., Jahrbiicher D. M. Ges. ix, p. 185, 

 1882; 1. c. xi, p. 311, 1884; /. c. xii, p. 391, 1885, t. 10, f. 18.- 

 Polygyra eastlakeana Mlldff., GREDLER, Mai. Bl. ix, p. 129, 1887. 



