584 MB. BDGAE A. SMITH ON LAND-SHEI/LS [May 2, 



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



Testa orbicularis, depressa, anguste unibilicata, tenuis, suhpellucido- 

 cornea, nitida, lineis incrementi leviter subplicatis scuJpta ; spira 

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

 accrescentes, infra suturam impresse marginati ; apertura oblique 

 lunata ; peristoma tenue, margine columellari ad insertionem 

 ■breviter expanse et reflexo, alba, umbilicum Tiaud tegente. 

 Diam. maj. 12 millim., min. 10|, alt. 8. 

 . Hab. Nyika Eange, 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 XXXIIl. figs. 26, 27, 

 28.) 



Testa T. masukuensi similis, sed minor, latius perforata, depressior ; 

 anfractibus quinque, magis celeriter crescentibus, vJtimo (spirce 

 respondente) majori ; margine columellari vioo rejleoco, minime 

 incrassato vel exp)anso. 



Diam. maj. 8| miUim.., min. 7, alt. 4g. 



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 XXXIIl. fig. 31.) 



Eelicc (Pella) whytei. 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. ZiKGis joHNSTOifi, sp. nov. (Plate XXXIIl. figs. 29, 30.) 



Testa depressa, anguste unibilicata, tenuissima, cornea, lineis 

 duobus angustis rujis cincta, lineis incrementi tenuibus striisque 

 spiralibus minutis sciilpta ; spira breviter conoidea, ad apicem 

 obtusa ; anfractus 5, regidariter, hand celei-iter crescentes, convexi, 

 ultimus ad periplieriam obtuse angidatus, Jiaud descendens, infra 

 vix concentrice striatus ; apertura obliqua, lunata ; peristOTna 

 tenue, margine columellari ad. insertionem breviter rejiexo. 



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



Hab. Masuku Plateau, 6000-7000 feet. 



Allied to Z. episco]X(lis Smith and Z. radiolata Martens. 



20. Maetensia consociata, sp. nov. (Plate XXXIIl. 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 pro- 

 funda sejuncti, supra sed ad suturam carina marginati 



