NANINA. 15 



Genus NANINA, Gray, 1834. 

 Subgenus ARIOPHANTA, Desmoulins, 1833. 

 N. KADAPAENSIS, Nevill. PI. 1, figs. 1, 2. 



Shell perforate, solid, obliquely striate, chestnut colored, white 

 zoned at the suture, periphery and base ; whorls 5J, the last 

 descending anteriorly, base inflated ; aperture concolored, lip 

 obtuse, white, columellar margin a little reflected, almost cover- 

 ing the perforation. Diam. 37, alt. 27 mill. 



Kadapa, India. 



Long known under the name of Helix Nicobarica, Chemn., but 

 is not found at the Nicobar Is. 



N. LAIDLAYANA, Benson. PI. 1, tigs. 3, 4, 5. 



Shell narrowly im perforate, thin, obliquely striate, decussated 

 by crowded spiral striae, translucent, shining, whitish, with a 

 narrow chestnut zone at the suture, a wider band above the 

 periphery, and a narrow one below it, throat and lip chestnut 

 colored ; whorls 5, suture lightly impressed ; the last whorl angu- 

 lated at the periphery, slightly descending in front, convex below, 

 columellar margin greatly narrowing the perforation. Diam. 27, 

 alt. 15 mill. 



Bengal. 



N. parietalis, Martens, is a synonym. Sometimes only the 

 sutural and a narrow peripheral band are present. 



N. THYREUS, Benson. PI. 1, fig. 6. 



Shell umbilicated, depressed, solid, bluish horn color, closely, 

 sharply striate above, with obsolete slight spiral stria? ; whorls 

 5, with sutures scarcely impressed ; body whorl carinated, below 

 the carina obsoletely chestnut fasciated, not descending at the 

 aperture ; base shining, radiately striate ; interior purplish 

 brown, white zoned in the middle. Diam. 35, alt. 1(> mill. 



Southern India. 



N. ryxsolemma, Gray, is a synonym. 



N. CYSIS, Benson. PI. 1, figs. 7, 8. 



Shell umbilicated, rather solid, closely plicate striate, light 

 olivaceous horn-colored, under a deciduous epidermis ; whorls 5, 

 with impressed suture, the last whorl wider, tumid, slightly 

 descending in front; periphery very obsoletely angulated ; aper- 



