NAN!NA. 53 



X. CULMEN, Blanford. PL 24, fig. 8. 



Very minutely perforated, very thin, horny, translucent above, 

 with about nine fine raised spiral lines, minutely decussately 

 striated below ; whorls 6, sharply keeled at the periphery of the 

 last whorl. Diam. 5'7o, alt. 5'5 mill. 



Pegu. 



"Easily distinguished from N. confinis and N. Attegia by its 

 smaller size and higher spire, from N. arx by the sides of the 

 spire being straight and not concave, and from the Bengal N. 

 infula, Bens., by its sculpture, and its sharper keel." 



X. CONFINIS, Blanford. PL 24, fig. 9. 



Minutely perforated, very thin, whitish horny; whorls 7, with 

 four or five spiral ribs and fine oblique lines of growth, the last 

 sharply keeled, and very finely radiately striated below. 



Diam. 10*5, alt. 7 mill. 



Pegu. 

 X. HAROLDI, Godwin-Austen. PL 24, fig. 10. 



Imperforate, pale umber-brown, with ten spiral thread-like 

 white ribs above, and distant concentric ribs on the base; 



whorls 7. Diam. 3'3, alt. 27 mill. 



Andaman Is. 



X. GROMATICA, Godwin-Austen. PL 25, figs. 11, 12. 



Scarcel}' perforate, pale ochraceous umber-brown, whorls 7, 

 the last sharply keeled, base flattened, sculptured above with 10 

 distant spiral thread-like ribs, and four approximate ones near 



the suture. Diam. 3'4, alt. 2'7 mill. 



Munipur Hills. 



A variety (fig. 12) differs only in the spiral ribs being 12 to 

 14 in number. 



X. PHULONGENSIS, Godwin-Austen. PL 25, fig. 13. 



Scarcely perforate, pale sienna-brown, with 6 or 7 spiral ribs 

 above, and five close concentric ribs on the base ; whorls 5i, 

 suture well impressed. Diam. 2'5, alt. axis, 2'3 mill. 



North Cachar Hills. 

 X. LIRICINCTA, Stoliczka. PL 25, fig. 14. 



Xarrowly umbilicated, thin, with four spiral ribs of which the 

 median ones are stronger, and three or four thin subperipheial 



