MOLLUSCA FROM EQUATORIAL AFRICA. 207 



Ennea aberdarensis, sp. n. (PI. XXXII. figs. 6, 6 a.) 



Shell difl'ering from E. keniana Preston * in its more ovate 

 form and much smaller size, in having but 6 whorls, a more 

 curved columella, more regularly rectangular apei'ture, and pio- 

 portionately stronger armature, though the arrangement of the 

 apertural lamelJaj is quite similai-. 



Alt. 2-75, diam. maj. 2-75 (nearly) mm. 



JIab. Mt. Kenangop, Aberdare Range, British East Africa 

 {Robin Kemvp). 



Ennea kigeziensis, sp. n. (PL XXXIV. figs. 2, 2 a.) 



Shell small, shortly cylindi-ical, whitish, somewhat shining; 

 whorls 6|, the first four and a half regularly increasing, the last 

 two regularly increasing in length, but very slightly diminishing 

 in breadth, marked with growth-lines, otherwise smooth, except 

 in the subsutural region, where the shell is coarsely plicate ; 

 suture well impressed ; umbilicus laterally compressed into a 

 fissure ; columella somewhat curved, outwardly expanded ; labrum 

 white, expanded outwards and reflexed, the margins converging 5 

 aperture subquadrilateral, armed with a single, ra,ther coarse, 

 erect and vertical, parietal lamella, a coarse, nodulous denticle on 

 the inner margin of the outer lip, below which and very interiorly 

 situate occurs a broadly triangidar lamella, and a broad, in- 

 teriorly situate projection on the columella ending in three 

 distant, pointed denticles. 



Alt. 3 (about), diam. maj. 1*5 mm. 



Hob. Kigezi, extreme S.W. Uganda {Robin Kemp). 



Ennea laqueus, sp. n. (PI. XXXIV. figs. 5, 5 a.) 



Shell rather small, ovately cylindrical, solid, whitish ; whorls 

 6g, the first two and a half regularly increasing, the third much 

 larger, the antepenultimate proportionately so, the penultimate 

 increasing in length but scarcely in breadth, and the last also 

 increasing in length but diminishing in breadth, the apical 

 whorls faintly and finely, decussately sculptured with transverse 

 and spiral striae, the remaining whorls sculptured with moderately 

 fine, closely-set, oblique costuloe, which become finer and still 

 more closely set in the strangulated area just behind the labrum, 

 and where also traces of microscopic, spiral striae are visible ; 

 suture well impressed ; umbilical area represented by an obliquely 

 elongate depression ; columella descending in a curve and bearing, 

 very internally, a broad, sloping, shelf-like projection ; labrum 

 white, poi-cellanous, continuous, outwardly expanded and reflexed, 

 callously flattened against the parietal wall ; aperture irregularly 

 ovate, bearing an erect, parietal lamella, and a projection on the 

 upper portion of the outer lip which bears two small, fine lamellae 

 above and a. coarser one below, the parietal lamellje fitting 

 between the two former ; at the base of the aperture, somewhat 



* Ann. Mag. Nat. Hist. vol. vii. 1911, p. 464, pi. xi, fig. 3. 



