NANINA. 55 



B. Shell globoxe, whorls tumid, with many fine close-set 



spiral ribs. 



X. RIMICOLA, Benson. PI. 25, tigs. 20, 21. 



Scarcely perforate, thin, fragile, diaphanous, light corneous, 

 obliquely striulate, with regular fine revolving striae ; whorls 

 5J-6, suture lightly impressed. Diam. 4*5, axis 4 mill. 



N. W. Himalayas, Darjiling, Khasi Hills. 



Sometimes the periphery is slightly obtusely angulated. 



X. CIRCUMFILARIS, Morelet. PL 25, fig. 22. 



Rimately subperforate, thin, light fulvous, lighter below, 

 smooth, very lightly thinly striate ; whorls 6, the last obtusely 

 angulated on the periphery. Diam. 3'3, alt. 3'3 mill. 



Anjouin, Comoro Is. 



b. Sides convex ; spiral ribbing less regular. 



N. INJUSSA, Blanford. PL 25, fig. 2H. 



Scarcely perforated, rather thin, light corneous, obliquely 

 striate above, rad lately striate below; whorls 5A, the last evan- 

 escently angulated on the periphery. Diam. 3'25, alt. 3*25 mill. 



Nilghiri Hills. 



bb. Globosely turbinate, very small. 



N. FEBRILIS. Blanford. PL 25, fig. 24. 



Very narrowly perforate, spirally lirate ; whorls 4^, smooth 

 below. Diam. 1-5, alt. 1'25 mill. 



Kalryenmully Hills, Central India. 



C. Shell depressly conoid, whorls turreted, with one or two spiral 



ribs ; apex flat. 



N. TRICARINATA, Blanford. PL 25, fig. 25. 



Openly perforate, thin, light corneous, obliquety striulate, ob- 

 soletely decussated below ; whorls 4, the last with three strong, 

 thread-like spiral carinae, the others with two carinae. 



Diam. T66, alt. 1 mill. 



Nilghiri Hills. 



X. KUANGSIENSIS, Tryon. PL 26, figs. 26, 2t. 



Perforate, thin, subpellucid, scarcel}' shining; yelloWish white; 



