24 Messrs. J. C. Melvill and J. H. Ponsoriby on 



IV. — Descriptions of Ten new Species of Terrestrial Mollusca 

 from South Africa. By James CoSxMO Melvill, M.A., 

 F.L.S., and John Henry Ponsonby, F.Z.S. 



[Plate Vm.] 



Since our last paper* on the subject we have received several 

 shells which appear to be hitherto undescribed. To one of 

 these- — a Dorcasia — we would direct special attention, on 

 account of its remarkable characters. Amongst the novelties 

 are several interesting Emiece, and as in so critical a genus it 

 is imperative that all the species should be figured, we have 

 pleasure in including a figure of J^. consobrina, Ancey (see 

 Brit. Naturalist, 1892, p. 125), acknowledging at the same 

 time our indebtedness to Mr. Brockton Tomlin, who has 

 kindly entrusted us with his type specimen for the purpose. 



Natalina caffrula, sp. n. (PI. VIII. fig. 1.) 



N. testa depresso-conica, tenui, late et profunda umbilicata, supra 

 parum nitente, sed subtus corusca, corneo-olivacea ; anfractibus 

 quinqne, ventricosulis, undique superne striis obliquis longitu- 

 diualiter decoratis, ultimo rapide accrescente, striis infra medium 

 evanidis ; apertura ovato-lunari ; peristomate tenui, simplici. 



Diam. max. 11|, min. 9|; alt. 5^ mm. 



Hah. Knysna. 



An interesting species, depressedly conical, thin, widely 

 and deeply umbilicate, basally shining, horny-olivaceous in 

 colour ; five-whorled, the whorls slightly ventricose, orna- 

 mented above with longitudinal oblique striaj ; the last whorl 

 increases rapidly ; below the middle the strife become obso- 

 lete ; the aperture is ovate-lunar ; peristome thin, simple. 

 The specific name is suggested by the resemblance of the 

 shell to that of a diminutive iV. caffra^ Fer. 



Ennea caryatis f, sp. n. (PI. VIII. fig. 2.) 



E testa parva, recta, cylindriformi, tenuissima, albido-pellucida, 

 apice obtuso ; anfractibus septem, apud suturas distiucte im- 

 pressis, vitreis, undique lougitudiualiter striatulis, striis apud 

 medium evanescentibus, infra Icevibus, anfractu ultimo paullum 

 producto, fere Isevi ; apertura rotundo-ovata ; peristomate albo, 

 pellucido, incrassato, dentibus plicisve quatuor iustructo, pfica 



* Ami. & Mag. Nat. Hist. (6) vol. xix. p. 633. 

 t Kaovaris, iu ai'cliitecture, au oruament.al pillar. 



