NANINA. 51 



N. DUBTA, Taylor. (Unfignred.) Zanzibar. 



N. PELIOSTOMA, Martens. (Un figured.) Barava, N. of Zanzibar. 

 N. ALFIERIANA, Soleillet. (Unfigured.) E. Africa. 



N. FORMOSA, N. MEGASTOMA, N. INSIGNIS, N. UNIZONATA, N. AN- 



CEYI, all of Bourguignat. (Unfigured.) E. Africa. 



Section ZINGIS, Martens, 1878. 

 N. RADIOLATA, Martens. PI. 24, figs. 89-91. 



Rimate, thin, rather distantly radiately plicate-striae ; brownish 

 horn-color, with close, interrupted, whitish rays, and a chestnut 

 band on the periphery ; whorls 5, periphery rounded. 



Diam. 13, alt. 9'5 mill. 



Zanzibar. 



Section TROCHOZONITES, Pfeffer, 1883. 

 N. PERCARINATA, Martens. PL 24, figs. 92-94. 



Perforate, thin, decussated above by oblique strife and very 

 slight spiral lines; opaque, reddish brown; whorls 7, acutely 

 carinated on the periphery, suture channeled and with an im- 

 pressed line above the carina ; base yellowish brown, shining. 



Diam. 11-5-L5 mill., alt. 8-10 mill. 



Bonjongo, W. Africa. 

 N. IBUENSIS, Martens. PL 24, figs. 95, 96. 



Subperforate, thin, very finely obliquely striated, pellucid; 

 brownish horn-color ; whorls 7, the last sharply thread-keeled, 

 base smoothish. Diam. 13 mill., alt. 10 mill. 



Ib u and Bonjongo, W. Africa. 



N. TUMIDULA, Martens. PL 24, fig. 97. 



Perforated, rather thin, obliquely striate, and very lightly de- 

 cussated, shining ; reddish brown, light banded; whorls 7, the 

 last minutely carinate on the periphery. Diam. 14, alt. 6'5 mill. 



Bonjongo, W. Africa. 

 N. CALABARICA, Pfr. PL 24, figs. 99-1. 



Perforate, thin, smoothish, diaphanous, above with 6 sharp, 

 thread-like, spiral lirae ; corneous, whitish on the base; whorls 

 6, the last acutely carinate. Diam. 9'5, alt. 4*5 mill. 



Old Calabar, W. Africa. 

 N. FOLINT, Morelet. PL 24, fig. 98. 



Perforate, thin, distantly costate above, subdiaphanous, 



