90 NANTNA. 



N". HYALTNA, Martens. PI. 29, figs. 49-51. 



Scarcely perforate, stimulate, shining ; yellowish corneous ; 

 suture margined, purplish chestnut ; whorls 6^, periphery 

 rounded, umbilical region excavated. Diam. 22, alt. 12 mill. 



Western Borneo. 

 N. CYCLOIDEA, Albers. PL 30, figs. 52-54. 



Very narrowly umbilicated, thin, smoothish, shining; yellow- 

 ish corneous, base lighter; whorls 7, suture margined. 



Diam. 20, alt. 9 mill. Himalaya Mts. 



N. CONSEPTA, Benson. PL 30, figs. 55, 56. 



Barely perforate, smooth, shining, rather thick ; pale oliva- 

 ceous ochre, more deeply colored near the peristome; whorls 6; 

 peristome slightly thickened. Diam. 14'5, alt. axis 6 mill. 



Moulmein, Pegu. 



Godwin-Austen thinks it possibly the same as the preceding- 

 species. 



N. BENOITI, Crosse and Fischer. PL 30, figs. 57, 58. 



Scarcely perforate, thin, hyaline, shining; corneous; whorls 6. 



Diam. 16, alt. 9 mill. 



Cochin China, Cambodia. 



N. DECUSSATA, Benson. PL 30, figs. 59, 60. 



Perforate, thin, smoothish, very lightly decussated above, a 

 little shining; light brownish corneous ; whorls 6, slowly increas- 

 ing, suture smooth, margined, periphery subangulate, base 



flattened. Diam. 25, alt. 11 mill. 



Bengal. 

 N. VITRINOIDES, Desh. PL 30, figs. 61, 62. 



Imperforate, very thin, fragile, vitreous, polished, smooth, 

 translucent ; amber^ellow ; whorls 5, narrow. Diam., 15 mill. 



Hab. unknown. 



The following Indian species has usually been confounded 

 with this. 



N. PSEUDOVITRINOIDES, Nevill. PL 30, figs. 63-65. 



Perforate, thin, smooth, fragile; light corneous; whorls 6, 



suture margined. Diam. 23, alt. 12 mill. 



Bengal. 



It is N. Indica, Benson (in part), and N. Vitrinoides of 

 Pfeiffer, etc., not Deshayes. The animal is ash-colored, the 



