JOO Messrs. J. C. Melvill mid J. II. Ponsonby on 



anjjustis, ventricosulis, apud suturas multum imprcssis, Tindique 

 snb Icntc arctissirae liratis, liris tcnuibus ; npcrtura lunari, pcri- 

 stomatc tenui. 

 Alt. 75, diam. lo ram. 



finh. Fern Kloof, Graliamstown (/. Farquhar). 



Another exceedingly niinnte species, with deep perspective 

 iinibilicu.=. With the aid of a lens the whole surface, which 

 is horny and subpellucid, is seen to be very closely lirato- 

 Rtriate, There is a single broadish spiial groove present, 

 vanning through the centre of tlie body-whorl, but not quite 

 extending to the orifice, this being an unusual character, and 

 one which we have not before met with in any other South- 

 African Helicoid. A few examples only. 



Trachycystis spissicosta *, sp. n. (PI. VI. fig. 13.) 



T. testa parva, dcpresso-globosa, umbilicata, tenni, subpellucida, 

 cornea ; anfractibus 4, ad suturaa multum impressis, apice ipso 

 Isevi, aliter undique arctissime longitudinaliter tenuiliratis ; aper- 

 tura rotundo-lunari, peristomate tenuissimo. 



Alt. 4, diam. 6"5 mm. 



IJab. Near the racecourse, Graliamstown (/. Farquhar). 



A pretty species, of the same alliance as T. biscul//tn, 

 Bens , hathy^oele and epetrima, JM. & P., &c., very strongly 

 cOitulate, thin, horny, globoscly depressed in form, and 

 narrowly but deeply umbilicate. 



^Pkasi's soUerst sp. n. (PI. VI. fig. 14.) 



Ph. testa anguste umbilicata, tenui, delioata, pallide straminea, 

 globoso-conica ; anfractibus 5, apud suturas impressis, undique, 

 praecipue superne, irregularitcr et oblique plicato-liratulis, super- 

 ficie omni, praecipue ad basin Isevigatam, spiraliter tenuissime 

 sub lente sericeo-striata, ultimo ad peripheriam angulato ; aper- 

 tura lato lunari ; peristomate tenui, marginem apud columellarem, 

 supra umbilicum, triangulatim reflexo. 



Alt. 4*5, diam. 7 mm. 



Hah. Melmoth, Zululand (Miss Hickfy). 



A very iQWf examples only have j'et been received of a 

 little Helicoid with a certain resemblance to Fhasis capensis, 

 Pfr,, but entirely differing in texture, as seen by the above 

 description. The spiral, silky, close striation is only visible 

 with a powerful lens. We are not quite sure of its right 

 generic location, but provisionally place it in Phasis. 



* Spissus, costa, with close-set ribs, 

 f Sollers, adroit, expert. 



