1899.] PEOM BRITISH CENTEAL AFBICA. 581 



the two small denticles at the base of the aperture rather far 

 within from the margin. These occur also in the present species 

 in the same position. The teeth on the columella are divergent 

 and situated on a prominence. Those on the outer lip might be 

 described as two in number, whereof the upper is somewhat 

 irregularly bipartite. 



5. Ennea (Gtjlelia) fobtidentata Smith, var. 



Ennea fortidentata, Smith, Ann. Mag. Nat. Hist. 1890, vol. vi. 

 p. 162, pi. vi. fig. 6 ; Martens, Weichth. Deutsch-Ost-Afr. p. 21. 



Bab. Nyika Eange, 7000 feet. 



Generally a trifle stouter than the typical form from Mamboia, 

 and without the minute parietal tooth above the columella. 



6. Ennea (Gulella) vaeians, sp. nov. (Plate XXXIII. 

 figs. 3, 4.) 



Testa cyUndracea, rimata, pellucida, albida, oblique tenuiter costu- 

 lata ; anfractus 8, lente accrescentes, sutura profunda leviter 

 obliqua sejuncti,superiores duo (protoconcham constituentes) laves, 

 convexi, cceteri convexiuscidi j idtimus duobus prcecedentibus 

 angustior, pone labrum indevtatus ; apertura parva, intus 

 quadridentata ; dens parietalis unicus lamelliformis, pi'ominens, 

 dextrorsum concavus, prope labrum situs, alius paitZo minor 

 supra medium labri, tertius minimus ad basin aperturce, quartus 

 columellaris, maximus ; peristoma utrinque expansum, sub- 

 reflexum, leviter incrassatum. 

 Longit. 6 millim., diam. 2; apertwa fere 2 longa, 

 Hab. Mount Chiradzulu and Zomba Plateau, 5000 feet. 

 The parietal lamellar tooth is short, not extending far within, 

 and the columellar fold is broad, jutting out prominently across 

 the aperture. Another example in rather bad condition is some- 

 what longer, having a length of 7g millim., although consisting of 

 the same number of whorls. 



The two specimens from the Zomba Plateau are smaller, shorter, 

 and have only seven whorls. In other respects they agree pre- 

 cisely with the type. Length 5 millim., diam. 2. 



7. Stebptaxis johnstoni, sp. nov. (Plate XXXIII. figs. 5, 6.) 



Testa ovata, parum obliqua, rimata, albida, lineis incrementi 

 obliquis tenuissimis striata ; anfractus 6g, convexi, infra suturam 

 crenulati, ultimus paulo descendens ; apertura obliqua, longit, 

 totius ^fere cequans ; peristoma vix incrassatum, leviter expan- 

 sum, margine columellari reflexo. 



Longit. 10 millim., diam. 6| ; apertura 4| longa. 



Hab. Nyika Range and Zomba Plateau. 



Allied to S. denticulatus Dohrn and S. pusillus Martens. The 

 so-called " Ennea vitrea " of Morelet from Angola is also very 

 similar, yet distinct. 



Peoc. Zooi. Soc— 1899, No. XXXVIU. 38 



