NANINA. 57 



N. PLACITA, Godwin-Austen. PI. 25, fig. 32. 



Perforation concealed, distantly spirally ribbed, on the base 

 far apart and well raised ; pale horn-color ; whorls 4, periphery 

 rounded. Diam. 2'8, alt. axis 2 mill. 



Khasi Hills. 

 N. MONOMENA, Benson. PI. 25, fig. 33. 



Very narrowly perforate, radiately striate, whitish corneous, 

 smooth, translucent, not -shining ; whorls 6^, with a single thread- 

 like carina appearing on all the whorls, on the periphery of the 

 last. Diam. 5, axis 4 mill. 



Ceylon. 



D. Shell conoid, rounded below; aperture very oblique ; spiral 



ribbing both above and below ; columellar margin thickened, 

 perpendicular and twisted. 



N. GRATULAToa, Blanford. PL 25, fig. 34. 



Perforated, thin, whitish-horny ; spirally lirate and marked by 

 growth-lines above and below, not excavated around the perfora- 

 tion ; whorls 5, the last one keeled at the periphery. 



Diam. 5, axis 4 mill. 



Pegu. 



E. Apex acuminate, spire more or less concave, the longitudinal 



ribbing more regular and defined, a spiral sulcation break- 

 ing up the former into minute raised dots or dashes. 



N. APICATA, Blanford. PI. 26, fig. 35. 



Subperforate, or nearly covered, thin, corneous, sculpture 

 obsolete; whorls 6, theJast acutely carinate at the periphery. 



Diam. 14, axis 10 mill. 



Nilghiri Hills, India. 

 N. CACUMENIFERA, Benson. PI. 26, fig. 36. 



Covered perforate, thin, corneous, with seven moniliform 

 spiral lines, and minuter intermediate ones, radiately striate and 

 polished below, whorls 8, apex papillary, spire concave. 



Diam. 19, axis 10 mill. 



Nilghiri Hills, India. 

 N. CONCAVOSPIRA, Pfr. PI. 26, fig. 37. 



Subperforate, thin, scarcely striulate, brownish white under a 

 fugacious epidermis; whorls 7, suture submarginate, last whorl 

 with acute peripheral carination. Diam. 13-5, alt. 11 mill. 



Ceylon. 



