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Show 1899.] PROM BRITISH CENTRAL AFRICA. 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 (GULELLA) FORTIDENTATA Smith, var. Ennea fortidentata, Smith, Ann. Mag. Nat. Hist. 1890, vol. vi. p. 162, pl. vi. fig. 6 ; Martens, Weichth. Deutsch-Ost-Afr. p. 21. Hab. Nyika Range, 7000 feet. Generally a trifle stouter than the typical form from Mamboia, and without the minute parietal tooth above the columella. 6. ENNEA (GULELLA) VARIANS, sp. nov. (Plate XXXIII. figs. 3, 4.) Testa cylindracea, rimata, pellucida, albida, oblique tenuiter : anfractus 8, lente accrescentes, sutura profunda leviter obliqua sejuncti, superiores duo (protoconcham constituentes) convexi, cceteri convexiusculi; ultimus duobus prcecedentibus angustior, pone labrum indentcttus; apertura parva, intus quadridentata ; dens parietalis unicus lamelliformis, prominens, dextrorsum concavus, prope labrum situs, alius paido minor supra medium labri, tertius minimus ad basin aperturce, quartus columellaris, maximus ; peristoma utrinque expansum, sub-refiexum, leviter incrassatum. Longit. 6 millim., diam. 2; apertura 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 somewhat longer, having a length of 7| millim., although consisting of tbe same number of whorls. The two specimens from the Zomba Plateau are smaller, shorter, and have only seven whorls. In other respects they agree precisely with the type. Length 5 millim., diam. 2. 7. STREPTAXIS JOHNSTONI, sp. nov. (Plate XXXIII. figs. 5, 6.) Testa ovata, parum obliqua, rimata, albida, lineis incrementi obliquis tenuissimis striata ; anfractus 6|, convexi, infra suturam crenulati, ultimus paulo descendens ; apertura obliqua, longit. totius \fere cequans ; peristoma vix incrassatum, leviter expansum, 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. PROC. ZOOL. Soc-1899, No. XXXVIII. 38 |