196 Messrs. J. C. Melvill and J. H. Ponsoiiby on 



Btriato, zona castaueo-bruuuea supra medium pulchre succiucto ; 

 apertura rotundo-lunari ; peristomate teuuissimo, margine colu- 

 mellari circa umbilicum parvum triangulatim reflexo. 

 Alt. 14, diam. 24 ram. 



Hab. Umkoniaas, Natal [Burnup) ; 'Nkandlila Forest, 

 Zululaiid [Hay gar til) . 



Tills fine species is at once distino;uished from all its allies 

 by the peculiar lustreless surface of the last whorl, which is 

 encircled with numerous fine impressed revolving lines, pro- 

 ducing a dull silky effect. It may be added that in one 

 specimen the darker chestnut band, so conspicuous in the 

 others, is but faintly observable. 



Zingis ampliata, sp. n. (PL III. fig. 5.) 



Z. testa nitidissima, minute perforata, perlaevi, tenui, globulari, 

 succineo-olivacea ; aiifractibus 4, apud suturas distiucte impressia, 

 ultimo magno, rapide accresceute, ett'uso ; apertura late ovato- 

 rotunda ; peristomate tenui ; columella alba vix incrassata, super 

 umbilicum miuutum reflexa. 



Alt. 12, diam. 16 mm. 



Hah. Durban. 



A particularly glossy amber-coloured species, very thin and 

 smooth, which might indeed have been included in Helicarton 

 were it not for the slightly thickened columella, which 

 almost conceals the minute umbilicus. 



Trachycystis calorama*, sp. n. 

 (PI. III. figs. 6-6 b.) 



T. depresso-coiiica, obtecte perforata, tenui, pallide cinereo-olivacea ; 

 anfractibus 6, gradatulis, tumidulis, undique longitudinaliter arete 

 obliquiliratis, liris setigeris, setis longis, nitidis, acutis, nigres- 

 centibus, anfractu ultimo apud peripheriam rotuudo-angulato ; 

 apertura lunari ; peristomate tenui, marginem apud columellarem 

 triangulatim reflexo. 



Alt. 7, diam. 9 mm. 



Hab. Near Pinetown, Natal. 



A very neat and distinct Trachycystis, resembling T. Planti\ 

 Pfr., save for the exceedingly narrow and almost concealed 

 perforation, the umbilicus in its ally being wider and far more 

 conspicuous. The surface is entirely covered with an ashy- 

 olivaceous epidermis, which is furnished with bristle-bearing, 

 close, longitudinal, oblique lira^, these bristles being shining, 

 long, blackish, and exceedingly acuminate. 



* KaXos, bpafia, beautiful to behold. 



