NANINA. Ill 



N. TREASURYENSIS, Tryon. PI. 37, figs. 100-2. 



Narrowly perforate, thin, transparent, very gloss}^, with very 

 faint growth-lines ; pale brownish horn-color above, whitish 

 towards the umbilicus; whorls 4-5, suture slightly margined, 

 periphery rounded. Diam. 14, alt. 9 mill. 



Treasury Island, Solomon Archipelago. 



Whorls increasing more slowly than in N. casca, Gould. De- 

 scribed by Mr. E. A. Smith as N. nitidissima, a name preoccu- 

 pied by Mollendorff, 



N. SOLIDIUSCULA, E. A. Smith. PL 37, figs. 3-5. 



Ver} 7 narrowly perforate, somewhat solid, a little glossy above, 

 more glossy below, upper surface strongly arcuately obliquely 

 sculptured ; dark chestnut-brown, paler beneath, the umbilical 

 region becoming almost white ; whorls 6^, suture rather deep, 

 periphery obtusely angulated. Diam. 18, alt. 12 mill. 



Santa Ana Islands, Solomon Archipelago. 



Living generally on the trunks of cocoa-nut palms. Guppy. 

 Well distinguished by its sculpture and comparative solidity. 



Section DURGELLA (Blanford), Stoliczka, 1870. 



N. LEVICULA, Benson. PL 37, figs. 8, 9. 



Very narrowly perforate, thin, polished, subdiaphanous, ob- 

 liquely striulate, scarce!}' decussated by slight obsolete spiral 

 striae, yellowish corneous ; whorls 3, rapidly increasing, suture 

 margined, periphery subangulate. Diam. 7, axis 3*5 mill. 



Phie Than, Burmah. 

 Looks like a Yitrina, but is perforate. 



N. KHASIACA, Austen. PL 37, figs. 6, 7. 



Thin, shining, smooth, with close fine growth-lines; pale 

 ochraceous olive ; whorls 3, rapidly increasing. 



Diam. 7, alt. axis 2 mill. 



West Khasi Hills. 

 N. HONESTA, Gould. PL 37, fig. 95, 10-12. 



Subperforate, thin, shining, straw-colored or whitish; whorls 

 5, suture marginate, periphery obtusely angled, base with slight 

 spiral lines. Diam. 13, alt. 7'5 mill. Burmah. 



The shell varies, according to Stoliczka, some specimens 

 having rounded periphery. Var. described below. It is scarcely 



