584 MB. EDGAB A. SMITH ON LAND-SHELLS [May 2, 



16. Thapsia ntikana, sp. nov. (Plate XXXIII. figs. 24. 25.) 



Testa orhimlaris, depressa, anguste umbilicata, tenuis, suhpeUucvlo- 

 cornea, niticJa, Kneis incrementi leviter suhplicatis sculpta ; spira 

 breviter conoidea, ad apicem obtusa ; anfractus 5, convexi, lente 

 accrescentes, infra suturam. impresse marginati ; apertura oblique 

 lunata j peristoma tenue, marcfine eolumellari ad insertionem 

 breviter expanso et rejiexo, albo, umhilicum haud tegente. 



Diam. maj. 12 millini., min. lOg, alt. 8. 



Hab. Nyika Range, 7000 feet. 



The largest of the geuus 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, aed minor, latius perforata, depressior ; 

 anfractibus quinque, magis celeriter crescentibus, ultimo (spirce 

 respondente) majori ; margine eolumellari vix rejlexo, minime 

 incrassato vel exp)anso. 



Diam. maj. 8| millim,., min. 7, alt. 4^. 



Bab. Masuku Plateau, 6000-7000 feet. 



Quite distinct from masukuensis, although very like in colour 

 and general appearance until closely compared. 



18. ZiNGis whttei, Smith. (Plate XXXIII. fig. 31.) 



Helix (Pella) wliytei, Smith, Proc. Zool. Soc. 1893, p. 634, 

 pi. 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 JOHisrsTONi, sp. nov. (Plate XXXIII. figs. 29, 30.) 



Testa depressa, atiguste umbilicata, tenuissima, cornea, lineis 

 duobus angustis rvjis cincta, lineis incrementi tenuibus striisque 

 spiraJibus minutis sculpta ; spira breviter conoidea, ad apicem 

 obtusa ; anfractus 5, regidariter, haud celeriter crescentes, convexi, 

 ultimus ad perijiiheriam obtuse angidatus,haud descendens, infra 

 vix concentrice striatus ; apertura obliqua, lunata ; peristoma 

 tenue, margine eolumellari ad insertionem breviter rejlexo. 



Diam. maj. 16 millim., min. 13, alt. 10. 



Hab. Masuku Plateau, 6000-7000 feet. 



Allied to Z. episcopalis Smith and Z. radiolata Martens. 



20. IMaetensia consociata, sp. nov. (Plate XXXIII. figs. 32, 

 33, 34.) 



Testa depresse conoidea, umbilicata, tenuis, pallide cornea, striis 

 incrementi obliquis temiissimis confertis sculpta, infra striis 

 concentricis conspicuis ornata ; spira breviter conoidea, ad apicem 

 obtusa; anfractus sex, lente accrescentes, convexi, sutura pro- 

 funda sejuncti, supra sed ad suturam carina marginati 



