MOLLUSCA FROM EQUATORIAL AFRICA. 205 



Yar. MBARARAENSis, var. n. 



Shell smaller than tlie typical form and proportionately shorter, 

 with one whorl less, the denticle at the base of the columella is 

 also removed to a position considerably higher up and almost 

 overhanging the internal, shelf-like projection. 



Alt, 3'5 (nearly), diam. maj. 1"75 mm. 



Aperture: alt. 1 (nearly), diam. "75 mm. 



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

 \Rohin Kemii). 



Ennba insulsa, sp. n. (PI. XXXIII. figs. 13, 13 a.) 



Shell elongately ovate, very miniite, cream-coloured ; whorls 4|, 

 very convex, sculptured with oblique, transverse riblets, the last 

 ascending in frontj suture deeply impressed ; aperture sub- 

 quadrate, armed with a parietal lamella bearing a small, internal, 

 erect denticle towards the base of the outer lip and an internal 

 lamella on the columella ; labrum white, outwardly expanded, 

 continuous. 



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



Hc(h. Gazi, British East Africa {Robin Kemp). 



Ennea intradentata, sp. n. (PI. XXXIII. figs. 14, 14 a.) 



Shell small, cylindrical, yellowish white; whorls 6g, the first 

 two and a half rapidly, the remainder scarcely, increasing, rather 

 flat, smooth ; suture impressed ; umbilical area forming a shallow 

 depression ; columella descending obliquely, notched above, 

 bulging inwardly below ; labrum white, sinuous, narrowly re- 

 flexed ; aperture irregularly, somewhat elongately subquadrate, 

 armed with aii almost vertical, parietal lamella, an upwardly 

 directed, tooth-like lamella on the outer lip, below which and vei-y 

 interiorly situate occurs a nodulous lamella, two converging, 

 deeply situate, broad, basal denticles, and two broad lamellse also 

 very interiorly situate on the columella, of which the uppermost 

 is the stronger. 



Alt. 3"5, diam. maj. 1"25 mm. 



Hah. Jombene Hills, British East Africa, at an altitude of 

 6000 feet ; a single specimen was also taken on the route between 

 the Jombene Hills and Nyeri (Ilohin Kemp). 



Ennea iridescens, sp. n. (PI. XXXIII. figs. 12, 12 a.) 



Shell rather elongately cylindrical, thin, semitransparent, 

 whitish, polished, shining, slightly iridescent ; whorls 7, the first 

 four regularly increasing, the remainder increasing in length but 

 slightly diminishing in breadth, marked with coarse, oblique 

 growth-lines ; suture impressed ; umbilical area presenting the 

 appearance of a rather broad and shallow depression ; columella 

 almost vertically descending ; labrum rather broadly expanded 

 and reflexed ; apei'ture subquadrilateral, armed with a small, 

 rather interiorly situate denticle and a coarse, erect lamella on 

 the parietal wall, a projection on the inner margin of the outer 

 lip, and immediately below this and in the interior of the shell 



