MOLLUSCA FROM EQUATORIAL AFRICA. 209 



labrum ; labrum white, outwardly expanded and reflexed below ; 

 aperture subquadrate, armed with a coarse, oblique, parietal 

 lamella, two coarse, broad, projecting denticles on the inner 

 margin of the labrum, of which the lower is the larger, a small, 

 slightly interiorly situate, basal denticle, a minute denticle at the 

 base of the columella, and a broad, bifurcate, projecting lamella 

 on its median part. 



Alt. 6'25, diam. maj. 3 mm. 



Aperture: alt. 2, diam. 1'25 mm. 



Hah. Urguess, British East Africa {A. Blayney Percival). 



Ennba malasangiensis, sp. n. (PI. XXXIY. figs. 7, 7 a.) 



Shell cylindrical, yellowish white, somewhat polished ; whorls 

 6, the first very small, the second and third proportionately large, 

 regularly increasing, the remainder increasing in length but not 

 in breadth, moderately convex, having a somewhat weathered 

 appearance ; suture deeply impressed ; umbilicus rather wide, 

 shallow ; columella vertically descending, broadly expanded ; 

 labrum broadly expanded and reflexed below, continued along 

 the parietal VA'^all ; aperture subrectangular, armed with a small, 

 interiorly situate denticle, and a strong, curved, parietal lamella, 

 a broad, squarish projection on the inner margin of the outer 

 lip, an interiorly situate, basal denticle, and a broad, bifurcate 

 projection on the columella, of which the upper bifurcation is the 

 stronger. 



Alt. 3" 25 (nearly), diam. maj. 1-25 mm. 



Aperture: alt. '75, diam. '5 mm. 



Hah. Malasangi, S.W. Uganda {Rohin Kemp). 



Ennea masakaensis, sp. n. (PI. XXXIV. figs. 9, 9 a.) 



Shell small, acuminately ovate, in dead condition yellowish ; 

 whorls 6, the first five regularly increasing, the sixth increasing 

 in length but slightly decreasing in breadth, sculptured with 

 somewhat distant, vertical, transverse costulse ; suture im- 

 pressed ; umbilicus reduced to a narrow and shallow depression ; 

 columella obliquely descending; labrum continuous, rather broadly 

 expanded, reflexed ; aperture subquadrate, armed with a parietal 

 lamella and a broad denticle on the inner margin of the oviter 

 lip. 



Alt. 4, diam. maj. 1-75 mm. 



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



Hah. Between Masaka and Entebbe, extreme S.W. Uganda 

 {Rohin Kemp). 



Ennea mikenoensis, sp. n. (PI. XXXIV. figs. 10, 10 rt.) 



Shell cylindrically ovate, dark yellowish white ; whorls 8, the 

 first six regularly increasing, the last two increasing in length 

 but very slightly decreasing in breadth, sculptured with rather 

 coarse, oblique costulse ; suture impressed ; umbilicus narrow, 

 deep, rapidly widening below ; columella somewhat vertically 



