NESOPUP^E OP THE MASCARENE ISLANDS. 349 



have been aware of the inadequacy of the published data. 

 The original description may be found in Vol. xxiv, p. 135. 



The shell is imperforate, shortly rimate, cylindric, cinna- 

 mon-buff. First 1% whorls smoothish, the rest having un- 

 even oblique striaB, mainly obsolete or blurred on the last two 

 whorls, which have a minute vermiculate-granose sculpture, 

 varying in distinctness on different specimens. The upper 

 whorls are quite convex, the last two much less convex; last 

 whorl having a broad, shallow impression behind the lip, over 

 the upper palatal fold, both palatals showing through the 

 shell as light spots. The squarish-oval aperture is longer 

 than wide, having five teeth : angular lamella is quite low, 

 diverging from the parietal and joining the outer lip. The 

 parietal lamella is much the largest tooth. It is thin but 

 high, directed obliquely and a trifle sinuous. The columellar 

 lamella is situated high on the columella and rather deep 

 within, ascending a little as it enters, and the edge is directed 

 obliquely downward. The two palatals are well developed, 

 the lower a little deeper within and longer. The lip is slightly 

 lighter than the exterior, well expanded, with hardly any 

 thickening. A parietal callus is scarcely visible. 



Length 2, diam. 1.12 mm. ; barely 5 whorls. 



These shells do not differ materially from the Philippine 

 specimens which I have identified as malayana Issel ; yet as I 

 have examined the types of neither species, and the original 

 account of malayana is somewhat discrepant, the species are 

 both allowed to stand provisionally. 



This Indian species has much stronger microscopic rugosity 

 and less prominent oblique striae than N. minutalis. It differs 

 from N. corrugata chiefly by the well-developed palatal folds, 

 but it is also a little smaller than that species. 



VI. SPECIES OP THE MASCARENE ISLANDS AND COMOROS. 



The islands of the western Indian Ocean have representa- 

 tives of three genera of three subfamilies of Pupillidae. One 

 of these, the genus Gastrocopta,, has been considered in Vol. 

 xxiv, p. 127. They are small, white-toothed shells in which 



