NESOPUPA. Ill 



and slightly inclined to the left, just to the right centre of the 

 base, and a shorter one, nearly as deeply inset and slightly 

 inclined toward the base, a little more than halfway up the 

 columella, which is weak, erect, slightly concave, with margin 

 broadly expanded, but not obscuring the rima (Connolly). 



Long. 1.3, lat. 0.75 mm. 



Rodriguez Island (Snell and Thomasset). The type has 

 been presented by H. P. Thomasset to the British Museum. 



Nesopupa rodriguezensis Connolly, Journal of Conchology 

 XVII, Oct., 1925, p. 262, fig. 4. 



In view of the numerous insufficiently described and poorly 

 figured species of Pupillidae recorded from the Mascarene 

 Is., I am very chary of adding to their number. However, 

 careful study of Pilsbry's Manual, vol. XXV, seems to show 

 only one, N. mhmtalis (Mori.) from Mayotte, which can be 

 compared with the Rodriguez shell. The following points 

 from Pilsbry's description of minutalis should be found on 

 comparison with mine of rodriguezensis to establish what must 

 surely be specific difference between them. 



In minutalis: — 



(a) The surface is dull, with some irregular striation. 



(b) The angular lamella is quite low, forwardly diverging 

 from the parietal and joining, or almost joining, the outer lip. 



(c) The parietal lamella is high. 



(d) There are two quite short palatal folds; the upper 

 palatal is sometimes very small. 



N. hisulcata rhodesiana Pilsb., from the Victoria Falls, 

 appears to resemble more closely the new species, but is larger, 

 with stronger sculpture and longer denticles {Connolly). 



Nesopupa vengoensis Connolly. PI. 21, fig. 9. 



The minute shell is almost exactly a replica of N. griqual- 

 andica (M. & P.), but is slightly less strongly striate, and 

 differs clearly and constantly in dentition, the lower palatal 

 fold being absent and the basal tooth so much more deep set 

 that in some specimens it is hardly visible (Connolly). 



Length 1.6, width 0.8, aperture alt. 0.5, width 0.5, last whorl 

 1 mm. 



