'528 Mr. H. B. Preston on Mollusca from 



coarse, slightly curved, parietal lamella, a thick triangular 

 denticle on the outer lip, a short Lut well-developed lamella 

 immediately opposite on the columella^ and below this a small 

 denticle at its base. 



Alt. 4, diam, maj. I'To mm. 



Hab. yhirabi Hills, British East Africa. 



Enneajod, sp. n. (Fig. 5.) 



Shell minute, cylindrical, whitish, transparent, polished, 

 smooth ; whorls 5^, flat ; sutures incised, narrowly margined 

 below; labrum wiiite, not reflexed ; aperture semielliplical, 

 armed with a rather erect parietal lamella, a large lamella on 

 the upper part of the labrum, below which occur four small 

 denticles, of which the first, or that next to the large upper 

 lamella, is the smallest ; the columella is also broadened out 

 into a shelf-like projection. 



Alt. 2, diam. maj. '75 mm. 



Hab. Shimbi Hills, British East Africa. 



Ennea sjierabile, sp. n. (Fig. 6.) 



Shell pupiform, rimate, white, smooth ; whorls 7, flat, the 

 last bearing a single strangulation, and transversely puckered 

 into five creases behind the aperture; sutures impressed; 

 columella descending somewhat obliquely, outwardly ex- 

 panded, broadening inwardly into a lamella or fold, and ex- 

 tending above into a thick well-defined parietal callus ; 

 labrum broadly reflexed^ especially at the base ; aperture 

 irregularly subquadrate, armed with an oblique ]jarietal 

 lamella on the right side, a coarse lamella on the outer lip, 

 and a small basal denticle internally situate on the left. 



Alt. 5*25, diam. maj. 2"25 mm. 



Aperture: alt. 1, diam. '75 mm. 



Hub. Shimbi Hills, British East Africa. 



Somewhat resembling H. varians, Smith, from Chiradzula 

 Mountain, but without the obtuse spire, transverse sculpture, 

 and small basal denticle of that species. 



Ennea delicatula, sp. n. (Fig. 7.) 



Shell minute, ovately cylindrical, glossy, shining, whitish ; 

 whorls 65, bluntly increasing to the fourth, and then again 

 decreasing, sculptured with rather coarse, moderately distant, 

 transverse costulse ; sutures impressed ; columella descending 

 in a slight curve; labrum white, polished, rather broadly 

 reflexed ; aperture somewhat ovately rectangular, bearing a 



