1S76.] collected during the Dafla Expedition, 173 



CTCLOPHORUS AURORA, Bs. 



Agrees with the specimens from Dalingkote, Western Bhutan Duars. 



Ctclophorus Pearsont, Bs. 



Outer Range. 



Ctclophorus puscicolor, n. sp., PL VIII, A, Fig. 1. 



Shell umbilicated, globosely turbinate, covered with a greyish umber- 

 brown epidermis, with radiating longitudinal lines of ornamentation, the 

 bands of colour rather broader towards the apex, but throughout very 

 close together, in some specimens coalescing on the last whorl into a 

 uniform dark shade of brown. Spire conical, apex sharp. Whorls 6, well 

 rounded, with a single slightly raised ridge tipon the keel. Aperture cir- 

 cular, sub-oblique, peristome continuous, double, very slightly reflected. 

 Within the aperture grey. 



Alt. 1*24, major diam. 2'30 inches. 



Hab.— Dafla Hills. 



This is a very distinct form allied to C. JBensoni from the southern 

 face of the Khasi Hills, shewing towards the apex in some specimens a 

 tendency to the zigzag painting of that shell, but the uniform, striate, and 

 sober colouring of the rest of the whorls is a very marked character. Two 

 specimens have a moderately broad white band on the periphery, owing 

 to the abrasion of the epidermis upon the raised ridge of the keel. 



Ctclophorus expatstsus, Pfr. 

 Hab. — Outer sandstone range. 



Ctclophorus zebrinus, Bs. 



Hab. — Outer range, — very abundant. 



Ctclophorus (mtxostoma) nivicola, n. sp., PL VII, Figs. 1 & la. 



Shell flatly discoidal, openly umbilicated. Whorls 5, with distinct 

 longitudinal striation, the last well rounded on the periphery, large, the 

 rest rapidly decreasing, covered with a thick epidermis, colour dark brown- 

 umber. At half the circumference from the apex fine zigzag pale ochreous 

 markings ornament the upper surface ; these widen and are arranged closer 

 towards the apex, which is pale ; a black band on the periphery is bounded 

 by a pale narrow one. Spire slightly raised. Suture deep. Aperture 

 oblique, very slightly descending, circtdar. Peristome thickened, double, 

 reflected, with a small re-entering notch near the suture. Operculum cor- 

 neous, flat. 



Major diam. 1*0, alt. - 45 in. 

 23 



