32 HELIX. 



the last not descending, periphery rounded, base more flattened, 

 lightly striate ; margins of aperture approaching. 



Diam. 8 mill. 



Ins. Palma. 



Probably a true Discus. 



H. PARVULA, Rang (unfigured). Cape Verd. 



III. East African Species. 

 H. CRYOPHILA, Martens. PL 7, figs. 67-70. 



Openly umbilicated, distinctly, subdistantly costulate above, 

 lightly striate below, corneous, diaphanous, shining ; whorls 3J, 

 convex, the last one slightly deflected in front ; aperture diag- 

 onal, subcircular. Diam. 2 mill. 



Abyssinia. 

 H. ABYSSINICA, Jickeli. PI. 7, figs. 71-74. 



Perviously umbilicated, somewhat solid, opaque, brownish, 

 obliquely, strongly, closely costulate-striate ; whorls 4, a little 

 convex, slowly and regularly enlarging, suture rather deep, last 

 whorl narrow, not deflected in front; aperture oblique, widely 

 lunar. Length, 25 mill. 



Abyssinia. 



First described by Martens as H. rivularis, a name preoccu- 

 pied by Krauss. 



IV. Asiatic Species. 



H. EUOMPHALUS, Blanford. PL 7, figs. 75-77. 



Moderately umbilicated, fulvous corneous, thin, obliquely 

 striate, suture impressed ; whorls 4, rounded, the last somewhat 

 narrow, scarcely descending ; margins of periphery distant. 



Diam. 2 mill. 



Nilgiri Mts., India. 

 H. BIANCONII, Deshayes. PL 7, figs. 78, 79. 



Widely umbilicated, thin, pellucid, fuscous corneous ; whorls 

 5, narrow, convex, with deep linear suture, regularly thinly 

 striated, last whorl double width, below less strongly striate ; 

 extremities of peristome distant. Diam. 5 mill. 



Sytsliuan, China. 



Should be placed in Discus, perhaps. 



