156 OPEAS, COMORO IS., ETC. 



narrowly margined suture, the last whorl compressed about 

 the umbilical rimation, exceeding one-third of the entire 

 length of the shell. Aperture oblong, external margin sim- 

 ple, unexpanded, <columellar margin dilated, reflexed. Length 

 5%, diam. 2 mm.' : (Morelet). 



Comoro Is.: Mayotte (Marie). 



Stenogyra spinula MORELET, Journ. de Conch., July, 1883, 

 p. 194, pi. 8, f. 10. 



"Among those which live on the islands of East Africa 

 and on the neighboring continent, Stenogyra clavulina, 

 8. johannina, as well as the young individuals of S. clavulus, 

 are the only ones which approach the present species. But 

 it is distinguished from the first two by the more acieular 

 form, the last whorl being decidedly less inflated, whilst the 

 spire is more elongated ; by its sutural margin, and finally by 

 the columella being more broadly dilated. As to the young 

 specimens of 8. clavulus, they have six whorls in the spire, in- 

 stead of seven, when they are the same size, and the last whorl, 

 as in the preceding, is more developed. The shell, moreover, 

 is more solid, less glossy, less transparent, and the suture is 

 not margined. The species really differs therefore from all 

 others found in the same region. " (Morelet). 



33. 0. BRAUERI (Martens). PI. 12, fig. 15. 



A very small snail, 4.5 mm. long, last whorl 1.5 mm. wide 

 below, aperture 1.5 mm. long; yellowish- white, with nearly 

 vertical striae, convex forwardly; not glossy. Whorls 5^, 

 rather rapidly but regularly increasing, with impressed su- 

 ture, the first forming an obtuse apex, which however is not 

 thickened into a head as in Elma. Aperture long, pear- 

 shaped, very acutely angular above, narrowly rounded below. 

 Outer lip simple, thin, steeply rising, convex forwardly, and 

 under the suture noticeably retracted. Columellar margin 

 vertical, thick, passing into the basal margin in a short bend 

 without emargination, leaving a narrow umbilical slit be- 

 hind it. (Martens). 



Seychelles: Mahe, at Anse aux Pins, on cocoanut planted 

 strand. 



