210 MB. H. B. PRESTON ON AGNATHOUS 



descending ; labrum continuous, expanded and slightly reflexed, 

 notched on its outer margin ; apertui'e subrectangular, armed 

 with one very small, somewhat interiorly situate, parietal denticle, 

 and one coarse, curved above and straightly descending, parietal 

 lamella, a coarse, bifurcate denticle on the inner margin of the 

 labi-um, the upper bifurcation being much smaller than the 

 lower, a very interiorly situate basal tooth and a coarse, squarish 

 lamella- like tooth on the columella. 



Alt. 4, diam. maj. 2-25 mm. 



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



Hah. Burunga, Mount Mikeno, Belgian Congo, at an altitude 

 of 6000 feet {Robin Kemp). 



Ennea monticola, sp. n. (PI. XXXIV. figs. 12, 12 a.) 



Shell allied to E. commoda Smith * from the Mau Escarpment, 

 E. Uganda, but smaller, of a more cylindrical shape, with finer 

 transverse sculpture and having one whorl more ; the lamella 

 on the outer lip is also much more strongly bifurcate than in 

 U. commoda, and there is, in the present species, no internal basal 

 denticle immediately below it. 



Alt. 3*75, diam. maj. 2 mm. 



Aperture: alt. "75, diam. -5 mm. 



Eab. Larogi Hills, British East Africa, at an altitude of 6000- 

 7000 feet {A. Blayney Percival). 



Ennea mweeuensis, sp. n. (PI. XXXIV. figs. 14, 14 a.) 



Shell rimate, ovately cylindrical, shining, whitish ; whorls 7 

 the first four regularly, the remainder rather rapidly increasing, 

 flattish, the last ascending in front, sculptured with indistinct, 

 oblique, transverse striae, which are more apparent in the sub- 

 sutural region and become very marked on the base of the shell ; 

 suture impressed, scarcely crenellate ; umbilicus reduced to a 

 narrow fissure ; columella obliquely descending, bulging inwardly 

 and slightly, erectly, outwardly reflexed ; labrum reflexed, 

 expanded, especially on the side opposite to the columella ; 

 aperture almost irregularly triangular with rounded base, armed 

 with an erect, oblique, parietal lamella, a projecting, lamelliform 

 denticle on the inner margin of the outer lip and two denticles, 

 one situate at the base of, and the other about halfway up, the 

 columella. 



Alt. 7, diam. maj. 3-5 mm. 



Apei-ture : alt. 2-5, diam. 2 mm. 



Hah. Mweru, British East Africa (type) ; also found on the 

 Jombene Hills at an altitude of 6000 feet {liohin Kemp). 



It may be well here to point out that the village of Mweru 

 above mentioned should not be confounded with the well-known 

 Lake of the same name situated fax to the south on the borders 

 of the Congo State and Northern Rhodesia. 



* J. Conch., Leeds, x. p. 315, pi. iv. fig. 9. 



