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Show 584 MR. EDGAR A. SMITH ON LAND-SHELLS [May 2, 16. THAPSIA NYIKANA, sp. nov. (Plate XXXIII. figs. 24, 25.) Testa orbicularis, depressa, anguste umbilicata, tenuis, subpellucido-comea, nitida, lineis incrementi leviter subplicatis sculpta ; spira breviter conoidea, ad apicem obtusa ; anfractus 5, convexi, lente accrescentes, infra suturam impresse marginati ; apertura oblique lunata; peristoma tenue, margine columellari ad insertionem breviter expanso et refiexo, albo, umbilicum haud tegente. Diam. maj. 12 millim., min. 10|, alt. 8. Hab. Nyika Range, 7000 feet. The largest of the genus now described. The species cannot be identified except by actual comparison, figures and descriptions being of very little use. 17. THAPSIA DECEPTA, sp. nov. (Plate XXXIII. figs. 26, 27, 28.) Testa T. masukuensi similis, sed minor, latiusperforata, depressior anfractibus quinque, magis celeriter crescentibus, ultimo (spirce respondente) majori ; margine columellari vix refiexo, minime incrassato vel expanso. Diam. maj. 8| millim., min. 7, alt. 4|. Hab. Masuku Plateau, 6000-7000 feet. Quite distinct from masukuensis, although very like in colour and general appearance until closely compared. 18. ZINGIS WHYTEI, Smith. (Plate XXXIII. fig. 31.) Helix (Pella) whytei, Smith, Proc. Zool. Soc. 1893, p. 634, pl. lix. figs. 3, 4. Hab. Mount Chiradzulu. Some of the specimens from this locality are larger than the types, the largest having a diameter of 25 millim. 19. ZINGIS JOHNSTONI, sp. nov. (Plate XXXIII. figs. 29, 30.) Testa depressa, anguste umbilicata, tenuissima, cornea, lineis duobus angustis rufis cincta, lineis incrementi tenuibus striisque spiralibus minutis sculpta ; spira breviter conoidea, ad apicem obtusa ; anfractus 5, regulariter, haud celeriter crescentes, convexi, ultimus ad peripheriam obtuse angulatus, haud descendens, infra vix concentrice striatus ; apertura obliqua, lunata; peristoma tenue, margine columellari ad insertionem breviter refiexo. Diam. mag. 16 millim., min. 13, alt. 10. Hab. Masuku Plateau, 6000-7000 feet. Allied to Z. episcopalis Smith and Z. radiolata Martens. 20. MARTENSIA CONSOCIATA, sp. nov. (Plate XXXIII. figs. 32, 33, 34.) Testa depresse conoidea, umbilicata, tenuis, pallide cornea, striis incrementi obliquis tenuissimis confertis sculpta, infra, striis concentricis conspicuis ornata ; spira breviter conoidea, ad apicem obtusa; anfractus sex, lente accrescentes, convexi, sutura profunda sejuncti, supra sed ad suturam carina marginati |
