156 HELIX. 



appearance of some of the North American forms than of the 

 African." 



Section VII, ATOPA, Albers, 1850. 

 Subsection I, ATOPA, (restricted). 



H. CHAKPENTIERI, Pfr. PL 33, figs. 9, 10. 



Widely umbilicated, somewhat solid, obliquely costulate, scarcely 

 shining, greenish corneous; whorls 5, slowly increasing, moderately 

 convex, the last rounded, descending in front; aperture nearly 

 horizontal, whitish within, unarmed, lip widely expanded and 

 reflected, margins converging. Diam. 27*5 mill. 



Ceylon. 



H. PETTOS, Martens. PI. 34, figs. 36-38. 



Very widely umbilicated, closely granulosely striate, light fuscous; 

 whorls 8, narrow, the last angulate above, rounded below, a little 

 descending in front ; aperture diagonal, with continuous, thickened, 

 shortly expanded lip, separated above from the parietal wall only 

 by a small sinus. Diam. 14 mill. 



Himalaya Mts. India. 



H. RIVOLII, Deshayes. PL 33, figs. 11, 12. 



Widely umbilicated, somewhat solid, obliquely costulate above, 

 striate below, shining, greenish brown, spire immersed, but the apex 

 a little raised; whorls 5, convex, the last dilated, tubiform and 

 deflected in front; aperture rather oblique, with three parietal 

 laminae, of which the middle one is strong, curved, elongate and the 

 others small and deeper, there are also three subequal (sometimes a 

 fourth smaller) deep-seated palatal teeth. Diam. 24 mill. 



* Ceylon. 



If. earabinata, Fer. is a synonym. 



H. HUMBERTI, Brot. PL 33, figs. 22, 23. 



Widely, deeply umbilicated, somewhat solid, costulate-striate 

 above, scarcely striate below, shining, olive-brown ; whorls 5, scarcely 

 convex, the last descending in front; aperture oblique, obtusely 

 heart-shaped, with a strong central parietal lamella, and a short 

 deep-seated palatal one not visible exteriorly, margins of the light 

 olivaceous-brown peristome joined by an elevated callus, subdehtate 

 above, with a four-sided tooth below. Diam. 25 mill. 



Ceylon* 



