— 323 — 



obliqiiel)^ descending, outwardly thickened and broadly expanded, diffiised 

 above into a thickish, well defined, rather bvoad callus which reaches tlie 

 upper margin of the labrum; labrum white, polished, thickened and rather 

 narrowly reflesed, receding above to forni a shallow sinus; aperture 

 irregularly subtruucate. 



Alt. 7.25, diam. maj. 2.25 mm. 



Aperture : ait. 1.25, diam i mm. 



Hab. — Between Entebbe and Mbarara, S. W. Uganda (Robin 



Kemp). 



A number of spécimens were collected which appear to show 

 considerable variation, though with careftil comparison, it is poss- 

 ible to gradtiate them ail into one species. 



Trachycystis nigrotincta, sp. n. — PL XVII, fig. 9. 



Shell allied to I. fusco-olivacea ('), Smiïh from Xyassaland, but much 

 darker in colour, the présent species being almost black, it has also a rather 

 more elevated spire and possesses half a whorl more, it is also more coarse- 

 ly and sparcely hispid. 



Alt. 5, diam. maj. 7.5, diam. min. 6.5 mm. 



Aperture : ait. 3.5, diam. 3.5 mm. 



Hab. — Between Mount Kenia and Eusso Nyiro, British East 

 Africa (Robin Kemp). 



? Buliminus ugandae, sp. n. — PI. XVII, fig. 13. 



Shell thin, rimate, acutely turbinate, polished, shining, olive brown; 

 whorls 6, rapidly increasing, convex, marked with coarse, oblique growth 

 lines; suture deeply impressed; perforation very narrow, almost concealed 

 by the outward expansion of the columella; columella vertically descending, 

 outwardly expanded; labrum simple; aperture ovate. 



Alt 9, diam. maj. 5.5, diam. min. 4 75 mm. 



.\perture : ait. 4.25, diam. z.j^ mm. 



Hab. -■ Between Entebbe and ]Mbarara, S. W. Uganda (Robin 

 Kemp). 



(') J^ioc. Zool. Soc. London, 1899, p. 585. 



