84 NANINA. 



narrow chestnut lines above the periphery, the upper one.appear- 

 ing on the spire ; whorls 4, rapidly increasing. 



Diam, 31, alt. 15 mill. 



Pondicherry, Tranquebar. 



Is N. exilis, Chemn. non Mull., and N. diaphana, Lea, non 

 Lam. 



N. CEYLANICA, Pfr. PI. 16, tigs. 28, 29. 



Perforate, rather solid, distinctly granulosely decussated above, 

 diaphanous, smoother and polished below ; very light orange- 

 brown, with a chestnut thread-like line above the periphery, with 

 or without a white narrow band next it, sometimes unbanded ; 

 whorls 4^, periphery very indistinctly angulate. Diam. 26, alt. 

 13 mill. 



Ceylon. 



Differs from N. Ustrialis in sculpture and banding. 



N. TAPROBANENSIS, Dohrn. PI. 16, fig. 30. 



Perforate, moderately solid, growth-lines very distinct above, 

 lightly, very minutely decussated, smooth and shining below ; 

 light orange-brown, with a narrow median chestnut line on the 

 last whorl ; whorls 4, the last obsoletely angulated. 



Diam. 30, alt. 18 mill. 



Ceylon. 



N. CYIX, Benson. PL 17, fig. 44. 



Perforate, rather thin, obliquely regularly closely costulate 

 above, subgranularly decussated by rather remote impressed 

 spiral lines, smoother and shining below ; corneous, lighter on 

 the base, periphery with a white narrow, inferiorly chestnut- 

 margined band ; whorls 4J, the last with obtusely angulated 

 periphery. Diam 23, axis 15 mill. 



Ceylon. 



N. SEMIPARTITA, Desh. PI. 16, fig. 31. 



Narrowly perforate, decussately striate above ; 3- ellowish white, 

 chestnut-zoned in the middle; whorls 5, the last with rounded 

 periphery. Diam. 26, alt. 15 mill. 



Hab. unknown. 



Martens doubtfully refers this species to the synonymy of N. 

 Wallacei, Pfr. 



