1899.] FEOM BBinSH OENTBAL AFEICA. 583 



scopicis sculpta ; spira parum elata, suhconvexe conoidea ; 



anfractus 5J, lente aca'escentes, convexiusculi, infra suturam 



anguste marginati ; apertura oblique lunata, margine columellari 



supenie hreviter dilatato et reflexo. 

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

 Hah. Mount Chii-adzulu. 



Flatter than T. hanningtoni, columella more oblique and reflexion 

 different, 



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

 17, 18.) 



Testa minima, fusco-cornea, nitida., depressa, orhicidaris, perforata^ 

 lineis incrementi tenuibus striisque spiralibus minutis sculpta ; 

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

 accrescentes, convexiusculi, anguste marginati, ultimus infra 

 spiraliter disiinctius striatus ; peristoma tenue, margine 

 columellari leviter expanso, vix rejiexo. 



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



Hob. Mount Chiradzulu. 



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

 from Mamboia, 



14. Thapsia masukubnsis, sp. nov. (Plate XXXIII. figs. 19, 

 20.) 



Testa angustissime scmiobtecte jjerforata, depressa, orhicidaris^ 

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

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

 apertura obliqua, lunata ; peristoma tenue, margine columellari 

 ad insertionem incrassato, albo, expanso, peculiariter reJlexo, 

 umbilicum semiohtegente. 



Diam. maj. 9 millim., min. 7§, cdt. 5g. 



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 depressa, orbicularis, anguste umhilicata, solidiuscula, nitida, 

 supra fuscescens, infra pallida ; spira brevissime conoidea, ad 

 apicem obtusa ; anfractus 5, convexi, infra suturam impresse 

 marginati, suhlente crescentes, lineis incrementi obliquis arciiatis 

 leviter striati, idtimus ad peripJieriam rotundatus ; apertura 

 oblique lunata ; peristoma tenue, margine columellari ad 

 insertionem late dilatato et rejiexo. 



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



Hah. Mount Chiradzulu. 



More solid and more depressed than T. nyihana, \vith a wider 

 umbilicus, and smaller aperture and body-whorl. 



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



38* 



