34 NANINA. 



above, is only conjectural. It is possibly N. lampas, Martyn, 

 and is very closely allied to N. Neptunus, Pfr., if not identical 

 with it. 



N. NEPTUNUS, Pfr. PI. 8, fig. 27. 



Umbilicated, rather thin, slightly foveolate by incremental 

 striae and spiral lines; olivaceous brown, somewhat shining; 

 whorls 5^, the last not descending, periphery obsoletely sub- 

 nngulated, base faintly fasciate with chestnut, interior whitish. 



Diam. 74, alt. 41 mill. 



Siam. 



N. HEPATIZON, Gould. PI. 9, fig. 34. 



Peforation covered, solid, closely obliquely granulosely striate, 

 decussated by thinner concentric lines ; dark chestnut-color, 

 including the interior; whorls 5j, the last obliquely corrugated, 

 with obsoletely angled or rounded periphery ; lip thickened, the 

 extremities joined by a thin, shining, parietal callus. 



Diam. 35, alt. 19 mill. Liberia. 



N. BALSTONI, Angas. PI. 28, fig. 3. 



Perforated, thin, sculptured all over with extremely fine, 

 close-set, engraved lines, crossing obliquely both ways and 

 giving the surface a delicately shagreened appearance under the 

 lens; fulvous horn-color; whorls 6, the last sharply keeled, not 

 descending anteriorly. Diam. 29, alt. 14-5 mill. 



Interior of Madagascar. 



Distinguished by its sculpture and fragility. In the original 

 description it is said to be imperforate, but Mr. E. A. Smith 

 (Zool. Proc. 379, 1882) mentions that specimens in the British 

 Museum are narrowly perforated. 



N. EKONGENSIS, Angas. PI. 28, fig. 6. 



Narrowly perforated, very thin, the oblique growth-lines 

 crossed by exceedingly fine, close-set concentric lines; pale 

 horn-color, with one narrow brown band above the suture on the 

 upper whorls, and two on the last whorl, one on either side the 

 subangulate periphery; whorls 6, the last not descending. 



Diam. 22, alt. 12 mill. 



Madagascar. 



