202 MR. H. B. PRESTON ON AGNATHOUS 



coarse, oblique, transverse costulse, and minutely, spirally malleated 

 so as to present a slightly decussate appearance ; sutui'e incised, 

 strongly crenellated by the terminations of the transverse 

 costulse ; umbilical area appearing as a narrow and shallow 

 depression ; columella slightly oblique ; labrum white, narrowly 

 expanded and reflexed, the margins distant ; aperture sub- 

 rhomboidal, armed with a single, erect, nearly vertically de- 

 scending, parietal lamella, a small denticle and a somewhat weak 

 lamella on the inner side of the outer lip, a well-developed basal 

 denticle at the base, and a broad squarish shelf -like projection on 

 the columella bearing a centi-al depression. 



Alt. 11'75, diam. maj. 5"5 mm. 



Aperture : alt. 4, diara. 2"5 mm. 



Hab. Kigezi, extreme S.W. Uganda, at an altitude of 7000 feet 

 {Robin Kemp). 



Ennea disseminata, sp. n. (PI. XXXIII. figs. 2, 2 a.) 



Shell small, i-ather shortly cylindrical, whitish, slightly polished ; 

 whorls 7, the thii'd, fourth, and fifth somewhat convex, the 

 sixth and seventh flattish. sculptured, especially on the later 

 whorls, with indistinct, oblique, transverse costulfe ; suture im- 

 pressed, rather distantly crenellated by the terminations of the 

 transverse costulse ; umbilicus reduced to a mere fissure ; columella 

 curved, extending above into a narrow, but thickish, parietal 

 callus ; labrum white, narrowly reflexed ; aperture subquadrate, 

 armed with a short, erect, parietal lamella, a broad, subbitid, 

 tooth-like projection on the inner margin of the outer lip, a small 

 basal denticle at the foot of the columella, and above this a broad, 

 rounded projection, very interiorly situate. 



Alt. 4'25, diam. maj. 2 mm. 



Aperture : alt. "75. diam. "5 mm. 



Hab. Near Lake Kivu (type specimen) ; also between Lake 

 Mutanda and the region between that lake and Lake Kivu 

 {Robin Kemp). 



Ennea euissoensis, sp. n. (PI. XXXIII. figs. 4, 4 a.) 



Shell ovately cylindrical with obtuse apex, scarcely rimate, 

 moderately solid, shining, dark cream-colour ; whorls 6, the first 

 three rapidly, the remainder regularly, increasing, slightly con- 

 vex, smooth but for lines of growth ; suture impressed ; columella 

 white, rather broadly, outwardly expanded ; labrum white, 

 expanded, slightly reflexed ; aperture rather broad and short, 

 armed with a coarse, oblique, parietal la,mella situated on the 

 right-hand side, a short, tooth-like lamella on the inner margin 

 of the outer lip and a small lamella situated on the median region 

 of the columella. 



Alt. 5'5, diam. maj. 2'5 mm. 



Aperture : alt. 1-5, diam. 1"25 mm. 



Hab. Eusso Nyiro, British East Africa [Robin Kemp). 



