128 NANINA. 



N. PELLUCIDA, Gonld. PI. 42, fig. 14. 



Perforate, thin, very lightly, minutely decussated, pellucid, 

 shining, light corneous ; whorls 5^, suture submargined, periph- 

 ery angulated. Diam. 20'5, alt. 10 mill. W. Africa. 



Is perhaps a not fully grown state of the next species, but is 

 more distinctly angulated than the incomplete stage of N. troglo- 

 dytes before me; if identical, Gould's name has priority of 

 publication. 



N. TROGLODYTES, Morelet. PI. 42, figs. 18-20. 



Perforate, thin, shining, very lightly, minutely decussated ; 

 3>-ellowish or brownish corneous; whorls 7, suture submargined, 

 periphery obtusely angulated, becoming rounded in front. 



Diam. 26, alt. 13 mill. Guinea. 



N. Africana, Pfr., is a synonym. According to Dr. von 

 Martens this species has also been observed at Bonjongo, Mozam- 

 bique, but his figure differs, and Bourguignat has given it a new 

 name. 



N. BUCHHOLZI, Bourg. PI. 42, fig. 90. 



This is the N. troglodites of Dr. von Martens, not Morelet. 



Bonjongo, Mozambique. 



N. NYASSANA, E. A. Smith. PI. 42, figs. 15-17. 



Perforate, thin, rather glossy, growth-lines rather prominent, 

 crossed by close concentric microscopic striae ; brownish corne- 

 ous ; whorls 5^, the last with a prominent keel. 



Diam. 25, alt. 13 mill. 



Between L. Nyassa and the East Coast of Africa. 



Perhaps should be united with Martensia (p. 50). 



N. BIGOTI, Crosse. PI. 42, fig. 10. 



Scarcely perforate, thin, shining, very obsoletely distantly 

 striate ; olive-fulvous; whorls 5, suture submargined, periphery 



very obsoletely angulated. Diam. 23, alt. 11 mill. 



Ins. Mayotte. 



N. LIBERIA, A. D. Brown (unfigured = ? a young troglodytes, 



Morel. CapePalmas. 



N. CEREA, Gould (unfigured). Gape Palmas. 



N. QLOMUS, Albers (unfigured. Perhaps a Streptaxis). Liberia. 



