

NESOPUP^E OP THE MASCARENE ISLANDS. 353 



lip. Parietal lamella high, rather long; columellar strong, 

 siibhorizontally entering, its crest slanting downward. There 

 are two quite short palatal folds, the lower one somewhat the 

 larger and more immersed. The upper palatal is sometimes 

 very small. According to Morelet ' ' trois denticules, visibles a 

 la loupe, sont placees sur le cote libre du peristome, a des 

 distances a peu pres egales Tune de 1'autre"; one of these 

 must be a basal fold ; but no basal is to be seen in the speci- 

 mens examined, and Morelet 's figure shows only parietal and 

 columellar teeth. The outer lip is well expanded. In a series 

 received from M. Marie it is not thickened, though whitish; 

 in another set, also from Mayotte, there is a distinct though 

 rather thin callous thickening, and the teeth are larger. 



Length 2, diam. 1.15 mm. ; slightly over 5 whorls. 



Length 1.8, diam. 1.1 mm. ; 5 whorls. 



This species, as Dr. Boettger has already noted, is related 

 to the East Indian N. malayana. It differs from that species 

 by the smoother surface, which has very little pitting or gran- 

 ulation. 



50. NESOPUPA COMORENSIS n. n. PL 33, fig. 5. 



The shell is minute, deeply rimate, ovate, glossy, brownish- 

 corneous, the apex rather obtuse. Whorls 5, convex, joined 

 by an impressed suture, the last slightly ascending, somewhat 

 compressed at the base. Aperture semioval, with two parietal 

 lamellae, another columellar, and two small teeth in the basal 

 margin. Peristome somewhat expanded, the margins sub- 

 parallel. Length 1.5, diam. 0.75 mm. (Morelet). 



Comoro Is.: Anjouan (Bewsher) ; Mayotte (Marie). 



Pupa monas MORELET, Journ. de Conchyl., vol. 27, 1879, p. 

 310, pi. 12, f . 4 ; vol. 31, 1883, p. 196. Not Pupa substriata 

 var. monas Westerlund, 1871. 



As specific and varietal names are held to have the same 

 status in nomenclature, the name of this species has to be 

 changed. 



51. NESOPUPA INCERTA (G. Nevill). Not figured. 



Shell very closely resembling Vertigo (Pagodella) ventri* 



