new Shells from British East Africa. 471 



ill front, having a somewhat \ve;itheied appearance ; suture 

 well impressed ; umbilicus reduced to a narrow chink; colu- 

 mella descending in a curve ; labruni continuous, white, 

 slightly reflexed, obtusely angled above on the outer side ; 

 aperture roundly ovate, armed with two short, erect, parietal 

 lamellae placed the one almost above the othcFj the lower of 

 which is very interiorly situate, a tubercular lamella on the 

 columella and a sub-basal lamella on the outer lip, above 

 which, and well inside the shell, occurs a small denticle. 



Alt. 3"25, diam. maj. 1'75 mm. 



Aperture: alt. 1, diam. '5 mm. 



Huh. Between liumruti and Mount Kenia, British East 

 Africa. 



Clausilia deyeneris^ sp. n. (Fig. 23.) 



Shell small, thin, cylindrically subulate, brown, streaked 

 with greyish white; whorls 7, somewhat convex, sculptured 

 with fine, oblique, closely set, silky, transverse strife; suture 

 well impressed ; columella whitish, arciied, bearing on the 

 upper portion a single erect lamella almost at right angles; 

 labrum continuous, whitish, slightly thickened, scarcely 

 reflexed ; aperture ovate. 



Alt. 6"25, diam. maj. 1*5 mm. 



Aperture : alt. 1, diam. '5 mm. 



Hah. Between liumruti and Mount Kenia, British East 

 Africa. 



A small degenerate form which almost marks the southern 

 limit of the genus on the African continent. 



Rebmanniella, sec. nov. 



Shell having broad, blunt, apical whorls and colunelhi 

 almost truncate. 



Type of section, R. I'nepta, 



Limicolaria [Rebmanniella) inepta, sp. n. (Fig. 24.) 



Shell fusiform, rather solid, the earlier whorls painted with 

 transverse s'ate-coloured flame-markings, the later whorls 

 brownish yellow, stained, streaked, and blotched with greyish 

 brown ; Avhorls 65, decussately sculptured throughout with 

 spiral striae and transverse riblets ; suture impressed, slightly 

 crenellate, margined below; columella descending nearly 

 vertically, diffused above into a thin polished callus, which 

 reaches the margin of the labrum, almost truncate below ; 

 Icibrum simj)le, acute, somewhat receding above and below ; 



