206 MR. H. B. PRESTON ON AGNATHOUS 



a stout, squarish denticle, a broad, well-developed, basal denticle 

 well within the aperture, and a bifid lamella on the columella, the 

 upper arm of which is much the coarser. 



Alt, 4, diam. maj. 1*5 mm. 



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



Hah. Near Kigezi, extreme S.W. Uganda [Jiobin Kemp). 



Var. CURTA, var. n. 



Shell shorter and proportionately a little broader, with one 

 whorl less ; the large, parietal lamella is less strongly developed 

 and the basal denticle more strongly so than in the typical 

 form. 



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



Aperture : alt. '75, diam. '5 mm. 



Hcch. Burunga, Mount Mikeno, Belgian Congo, at an altitvide 

 of 6000 feet [Robin Kemp). 



Ennea burungaensis, sp. n. (PI. XXXll. figs. 12, 12«.) 



Shell difiering from E. iridescens in its shorter, broader, and 

 rather less cylindrical form, in being obsoletely plicate on the 

 upper whorls, and in having the suture strongly crenellate ; the 

 apeiture is ovate a,nd lacks the small, interiorly situate, parietal 

 denticle of that species, the projection on the inner margin of the 

 outer lip is much more square in shape, stronger and more 

 mai'ked, and the denticle below is, in the present form, developed 

 into a long, curved, erect lamella ; moreover there are two large 

 basal denticles, the lower being interiorly situate, instead of the 

 single basal denticle of E. iridescens, and the bifid lamella on 

 the columella of that species is replaced by a broad, shelf-like 

 projection. 



Alt. 4"25, diam. maj. 1-75 mm. 



Aperture : alt. '75, diam, '5 mm. 



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

 of 6000 feet {Robin Kemj)). 



Ennea keniana Preston, var. parvula, var. n. 



Smaller than the typical form * from Mount Kenia. 

 Alt. 2*5, diam. maj. 1'5 mm. 



Hah. Between the Jombene Hills and Nyeri, British East 

 Africa [Robin Kemp). 



Var. INTERMEDIA, var. n. 



Intermediate between the typical form and var, parvula. 



Alt. 3 (about), diam. maj. 1-75 mm. 



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

 6000 feet {Robin Kemp). 



Both the above varieties appear to be well-marked local 

 races, the species seeming to become more stunted in the lower 

 covintry. 



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



