124 HELIX. 



Chinese species. 



H. DIPLOMPHALA, Mollendorff. PI. 25, figs. 61-63. 



Widely umbilicated, thin, obliquely striulate, corneous, hirsute 

 in transverse series, spire concave ; whorls 6 -7, a little convex, 

 narrow, the last laterally compressed and shortly deflected at the 

 aperture ; peristome slightly reflected, sinuate, extremities joined 

 by a slight parietal callus. Diam. 11 mill. 



China. 



H. BINODATA, Mollendorff. PI. 25, figs. 64-66. 



Moderately umbilicated, striulate, corneous ; whorls 6, subplan- 

 ate, periphery angulated, last whorl deflected at the aperture, 

 umbilical region defined by an obtuse angle ; peristome expanded, 

 .a little reflected, white, trisinuate within, with a superior and a 

 basal tooth. Diam. 7 mill. 



China. 



A 

 H. ACANTHINULA, Crosse. PI. 25, fig. 71. 



Moderately umbilicated, thin, pellucid, not shining, with irregu- 

 lar, close, oblique, rugulose strise, olivaceous under a blackish 

 epidermis ; whorls 3 J, flattened, the penultimate obsoletely carinated, 

 the last not descending, tricarinate, with short, distant fringes; 

 aperture olivaceous, peristome simple. Diam. 4'5 mill. 



Noumea, N. Caledonia. 



Placed in this group by Pfeiffer, but does not well agree with its 

 characters. 



Section II. POLYGYRA, Say, 1817. 

 Subsection I. POLYGYRATIA, Gray, 1847. 

 H. POLYGYRATA, Born. PI. 25, figs. 72-74. 



Very widely umbilicated, plane above, excavated below, solid, 

 striate, subdecussated by minute concentric lines, greenish yellow, 

 with a wide brownish band above ; whorls 9, the last descending in 

 front ; lip white, shortly reflected. Diam. 46 mill. 



Brazil. 



Var. CHARYBDIS, Morch. 



Whorls 7?, wider, umbilicus deeper and narrower. Diam. 38 mill. 



H. STENOGYRA, Pfr. PI. 25, figs. 75-80. 



Very widely umbilicated, somewhat solid, closely arcuately 

 .striated, a little shining, diaphanous, light corneous, spire subim- 



