34 Contributions to Indian Malacology. [No. 1, 



I have specimens of the latter from many different places, they are all 

 easily distinguished from N. intumescens. 



3. N. (Hemiplegia f) Sisparica, n. s. 



Shell openly perforated, subumbilicated, depressed, rather thin, 

 striated, white with a yellowish brown epidermis, having a rather dull 

 oily lustre. Spire convex, apex obtuse, suture flat, linear, submargi- 

 nate. Whorls 4, very flatly convex above, apical whorl marked with 

 very fine decussated plicate striation, the last not descending distinctly, 

 but bluntly angulate above the periphery, convex beneath. Aperture 

 oblique, semiovally lunate, white and pearly within, the breadth ex- 

 ceeding the height, peristome thin, margins distant, united by a thin 

 callus, columellar margin very oblique, and triangularly reflexed close 

 to the perforation. 



Millem. Inches. 



Major diameter, -. 37 1.5 



Minor ditto, . 31 1.3 



Axis, 18 .75 



Habitat. Sispara ghat, Nilgiri hills, S. India, rare. 



I know of no near Indian ally of this species. N. Orobia, Benson, 

 from Darjeeling, which approaches it in some respects, is more globose 

 and more solid, and has impressed sutures. The Ceylonese N. Chenui, 

 however, closely resembles the species above described in form, though 

 it is easily distinguished by its peculiar impressed sculpture. I ob- 

 tained but two specimens, one of which was living, near the top of 

 Sispara ghat. It is remarkable that so fine a shell should have escap- 

 ed detection before. 



The animal differs in no essential character from those of the sinis- 

 trorse Arioplmnta section. It has a large mucus pore at the end of 

 the foot without any lobe above, the mantle is of moderate size, the 

 head and neck granulated, the caudal portion of the body marked by 

 oblique parallel, impressed wrinkles, and broadly margined near the 

 sole with a double, impressed line. 



4. N. (Macroclilamys ?) Hebescens, n. s. 

 Shell scarcely perforate, inwardly depressed, yellowish or fulvons, 

 thin, horny, dull, marked with very close microscopic impressed 



