NANINA. 129 



Section OXYTES, Pfeiffer, 185.~>. 



X. OXYTES, Benson. PL 42, figs. 21, 22. 



Umbilicated, obliquely subplicate ; brownish corneous ; whorls 

 5 j, the suture carinate margined, periphery acutety angulated. 



Diam. 47, alt. 17 mill. 



Eastern Bengal. 

 X. CYCLOPLAX, Benson. PI. 43, fig. 23. 



Rather widely umbilicated, solid, closety striated above, sub- 

 decussated by more distant spiral striae ; reddish-corneous above ; 

 whorls 5, the periphery carinate, below the carina a chestnut 

 band, base greenish corneous. Diam. 41, alt. 17 mill. 



Sikkim Himalayas. 

 X. CASTOR, Theobald. PL 43, figs. 24-26, 34. 



Perforate, thin, striulate, and decussated by slight, almost 

 obsolete minute spiral lines ; corneous ; whorls 5^, suture linear, 

 periphery acutely angulated. Diam. 30, alt. 11*5 mill. 



Khasi Mts., India. 



N. Pollux, Theobald (figs. 24, 25) and N. Cherraensis, Blanford 

 (fig. 34), are only varieties of this form. 



X. BLANFORDI, Theobald. PL 43, figs. 27-29. 



Umbilicated, costulately striated, very minutety fiexuously 

 granulated, undulating at the periphery; brownish corneous, 

 with a narrow white line at the periphery and suture ; whorls 5^, 

 periphery acutely angulated. Diam. 24, alt. 9 mill. 



Darjilingj India. 



Umbilicus not so open as in N. O.rytes and N. cycloplax, but 

 more so than in 0. Castor. 



X. SHANENSIS, Austen. 



Umbilicated, thin, sculpture fine longitudinal striae arranged 

 in about fourteen wavy indistinct spiral bands ; dark ochraceous 

 or pale umber, covered with a thin epidermis ; whorls 5, periphery 



sharply keeled. Diam. 28, alt. axis 7 mill. 



Shan States, India. 

 Unfigured. 



X. OCHTHOPLAX, Benson. PL 43, fig. 30. 



Umbilicus partly covered, rather solid, obliqueh' rugosely 

 striate, obsoletely granulated, decussated by obsolete, distant 

 9 



