1899.] FBOM BRITISH CEITTEAIi APEICA. 583 



scopicis sculpta ; spira parum elata, suhconvexe conoidea ; 



anfractus 5i, lente accrescentes, convexiusculi, infra suturam 



anguste marginati ; apertxir a oblique lunata,margine columellari 



superne hreviter dilatato et reflexo. 

 Diam. maj. 7^ millim., min. 6|, alt. 4. 

 Hah. Mount Chiradzulu. 



Flatter than T. hanningtoni, columella more oblique and reflexion 

 different. 



13. Thapsia iKsiMTTLATfs, sp. nov. (Plate XXXIII. figs. 16, 

 17, 18.) 



Testa minima, fusco-cornea, nitida, depressa, orbicularis, perforata ^ 

 lineis incrementi tenuibus striisque spiralihus minutis sculpta ; 

 spira hrevissime conoidea, ad apicem obtusa ; anfractus 4g, lente 

 accrescentes, convexiusculi, anguste marginati, ultimus infra 

 spiraliter clisthictius striatus ; peristoma tenue, margine 

 columellari leviter expanso, vix reflexo. 



Diam. maj. 5 millim., min. 4|, alt. 3. 



Hah. Mount Chiradzulu. 



Quite distinct from T. hanningtoni and T. depressior Smith ^ 

 from Mamboia. 



14. Thapsia masukuej^sis, sp. nov. (Plate XXXIII. figs. 19, 

 20.) 



Testa angustissime semiobtecte perforata, depressa, orbictdaris, 

 tenuis, polita, fusco-cornea ; spira hreviter conoidea ad apicem 

 obtusa ; anfractus 5|, convexi, lente crescentes. anguste marginati ; 

 apertura obliqua, lunata ; peristoma tenue, margine columellari 

 ad insertionem incrassato, albo, expanso, peculiariter reflexo, 

 umbilicum semiobtegente. 



Diam. maj. 9 tnillim., min. 7|, alt. 5i. 



Hah. Masuku Plateau, 6000-7000 feet. 



The sculpture consists of faint lines of growth which are finely 

 plicate near the suture, and very minute, almost imperceptible 

 spiral striation. 



15. Thapsia simulata, sp. nov. (Plate XXXIII. figs. 21, 22, 

 23.) 



Testa dxpressa, orbicularis, anguste umbilicata, solidiuscula, nitida, 

 supra fv^cescens, infra pallida ; spira hrevissime conoidea, ad 

 apicem obtusa ; anfractus 5, convexi, infra suturam impresse 

 marginati, sublente crescentes, lineis incrementi obliquis arcuatis 

 leviter striati, ultimus ad peripheriam rotundatus ; apertura 

 oblique lunata; peristoma tenue, margine columellari ad 

 insertionem late dilatato et reflexo. 



Diam. maj. 11^ millim., min. 10, alt. 7. 



Hab. Mount Chiradzulu. 



More solid and more depressed than T. nyiJcana, with a wider 

 umbilicus, and smaller aperture and body-whorl. 



Ann. Mag. Nat. Hist. 1890, voL vi. p. 151. 



38* 



