50 NANINA. 



N. LYCHNIA, Benson. PL 24, fig. 79. 



Imperforate, thin, translucent, polished, lightly striulate ; 

 brownish or greenish brown ; whorls 6-jr, narrow, suture mar- 

 gined, last whorl acutely compressly carinate at the periphery. 

 Diam. 12, alt. 5-5 mill. Malacca, Nilgherry Mts. India. 



Section MARTENSIA, Semper, 1810. 

 N. MOZAMBICENSIS, Pfr. PL 24, fig. 80. 



Perforate, rather thin, with close thread-like striae, shining; 

 light reddish brown, base often yellowish gray, somewhat mar- 

 bled; whorls 5-6, suture submarginate, the last with a white 

 peripheral angle. Diam. 12-17, alt. 6-5-8 mill. 



Mozambique. 

 Var. ALBOP1CTA, Martens. 



Finely undulately obscurely radiated with white. 



Bourguignat (Helixarionida-, p. 7) thinks that the larger form 

 as described by von Martens does not belong to this species. 



N. PYRAMIDEA, Martens. PL 24, figs. 82-84, 81. 



Perforate, irregularly striulate, light brownish horn-color 

 above, periphery white, diaphanous whitish below ; whorls 6, 

 suture slightly margined, periphery scarcely angulated. 



Diam. 18, alt. 13 mill. 



E. Africa. 

 Var. LEUCOGRAPTA, Martens. Fig. 81. 



Radially interruptedly striated and spirally banded with white. 

 N. PLICATULA, Martens. PL 24, figs. 85, 86. 



Perforate, rugosely striate above, below lightly striulate ; vari- 

 egated with white and corneous brown, base whitish ; whorls 5, 

 the last with obtusely angulated periphery. 



Diam. 11, alt. 7 mill. 



Zanzibar. 

 N. JENYNSI, Pfeiffer. PL 24, figs. 87, 88. 



Subperforate, striulate, thin, shining; milk white, with a chest- 

 nut line above the carina ; whorls 5^, the last with obtusely an- 

 gulated periphery ; lip nearly closing the perforation. 



Diam. 12, alt. 7'5 mill. 



Zanzibar, and between L. Nyassa and the East Coast. It is 

 said also to inhabit Java and New Hebrides. 



