GASTROCOPTA, MASCARKNE ISLANDS, ETC. 12.9 



teeth. Length 2%, diam. % mm. ; aperture % mm. long and 

 wide (C.& F.}. 



Nossi-be at Calempo, type loc. (E. Marie) ; also Nossi- 

 Comba, under the bark of tamarinds, in company with Buli- 

 minus variolosus (E. Marie). 



Pupa seignaciana C. & F., Journal de Conchy!., xxvii, 1879, 

 p. 49 ; xxix, 1881, p. 199, pi. 8, f . 4. 



"The specimen figured [pi. 23, fig. 6] has only two parietal 

 teeth. According to M. Marie, the fully adult individuals 

 collected by him at Calempo have, besides the two parietal 

 teeth, two other denticles situated in the outer margin, of 

 which one should be scarcely noticeable" (C. & F.}. 



The figure given by Messrs. Crosse and Fischer shows that 

 there are not "2 dents parietales" but one parietal and one 

 columellar. The shell was evidently immature. There is a 

 grave inconsistency in Crosse 's measurements, which would 

 make the diameter contained 3% times in the length, an un- 

 heard-of ratio. According to the figure, the diameter is nearly 

 half of the length. Few authors have taken the trouble to 

 measure or describe small Pupae accurately, and in this case 

 I believe that both length and diameter were given incorrectly. 



Three specimens from the type locality, received from M. 

 E. Marie, are in the collection of the Academy, no. 22926. 

 Two of these, the longest and shortest, are drawn in pi. 23, 

 figs. 1 to 4. 



The shell varies somewhat in shape. It is cinnamon-buff, 

 with light, irregular striation. There is a very slight, scarcely 

 noticeable contraction behind the well-expanded outer lip, or 

 a distinct but quite low crest. The angular and parietal 

 lamellae are concrescent into a single slightly sinuous lamella, 

 which is highest in the middle, tapering forward. The middle 

 part is bent towards the periphery, giving an emarginate ap- 

 pearance in front view. The columellar lamella is strong and 

 horizontal. Upper palatal plica is very short, tubercular. 

 Lower palatal much larger and longer, more deeply placed. 

 The basal plica is extremely low and small, not whitish like 

 the other teeth, in one specimen, and not visible in another. 

 The peristome is slightly thickened within, pale brown. 



