MOLLUSCA FROM EQUATORIAL AFRICA. 213 



Eah. Mt. Elgon, Uganda {G. W. Woodhouse). 



An extraordinarily cylindrical form which does not appear, 

 so far as is at present known, to have any close ally in East or 

 East Central Africa. 



Ennea pervitrea, sp. n. (PI. XXXY. figs. 8, 8 a.) 



Shell cylindrical, polished, shining, glassy, transparent whitish ; 

 whorls 74, the first four and a half regularly increasing in 

 breadth and length, the last three increasing in length but not 

 in breadth, the last rapidly ascending in front, quite smooth but 

 for occasional growth-markings ; suture very slightly impressed, 

 narrowly margined below ; umbilicus very narrow, deep ; colu- 

 mella obliquely descending, spreading above into a thin, somewhat 

 extended, sinuously margined, parietal callus ; labrum white, 

 outwardly expanded and reflexed, especially below; aperture 

 semiovate, armed with a strong, curved, parietal lamella, a 

 moderately stout denticle on the inner margin of the outer lip, 

 and a broad, but less pronounced, denticle on the columella. 



Alt. 6'75, diam. maj. 3-25 mm. 



Aperture: alt. 1"75, diam. 1-25 mm. 



Hob. Forests to the nortli of Mt. Kenia, British East Africa 

 {^A. Blayney Percival). 



Ennea jombeneensis, sp. n. (PI. XXXTII. figs. 8, 8 a.) 



Shell allied to E. pilula * Preston from Mt. Kenia, but of a 

 thinner texture, lighter colour, more cylindrical form, and having 

 a less outwardly expanded columella and less strongly developed 

 labrum ; nevertheless the subparietal lamella is more strongly 

 marked, and beside it occurs, on the parietal wall, a small, vertical 

 denticle, which is quite lacking in U. pilula ; in addition to this 

 the present species possesses an extra basal lamella. 



Alt. 12'25, diam. maj. 6"5 mm. 



Aperture: alt. 2*75, diam. 1"5 mm. 



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

 6000 feet (type) ; also taken at Mweru {Rohin Kemp). 



Ennea polloner^, sp. n. (PL XXXV. figs. 9, 9 a.) 



Shell cylindrically rectangular, whitish, somewhat solid ; whorls 

 6g, the first two flattened above, the remainder flattened laterally, 

 the upper whorls regularly increasing, the last two decreasing in 

 breadth, sculptured with fine, oblique, transverse costulse ; suture 

 almost linear, crenellated by the terminations of the transverse 

 costulfe ; umbilical area marked by a shallow, elongate depression; 

 columella descending in a curve, extending above into a well- 

 defined, white, pai-ietal callus which reaches the upper margin of 

 the labrum ; labrum white, slightly polished, expanded and 

 reflexed ; aperture subcircular, armed with a coarse, sinuously 

 curved, parietal lamella extending far into the interior of the 



* Ann. Mag. Nat. Hist. 1911, vii. p. 465, pi. xi. fig. 5. 



