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



IV. — Descriptions of Ten new Species of Terrestrial Mollasca 

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

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



[Plate VIII.] 



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

 sliells 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 Ennece, 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 JE. consohrina, 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 profunde umbilicata, supra 

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

 (jiiinque, ventricosulis, undique superno striis obliquis lonijitu- 

 dinaliter decoratis, ultimo rapide accrescente, striis infra medium 

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



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



Ilah. 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 striie ; the last whorl 

 increases rapidly ; below the middle the strite 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 N. caffra^ F^r. 



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



E testa parra, recta, cylindriformi, teuuissima, albido-pellucida, 

 apice obluso; anfractibus scptem, apud suturas distiucte im- 

 pressis, vitreis, undi(pic loiigitudinaliter striatulis, striis apud 

 medium cvancscentibus, infra liDvibus, anfractu ultimo paullum 

 producto, fore la^vi ; apertura rotundo-ovata ; peristomate albo, 

 peUucido, incrassato, deutibus phcisvc quatuor instructo, plica 



♦ iVnu. & Mag. Nat. Hist. (6) vol. xix. p. G33. 

 + KaovaTii, iu archil«jcture, au urunmeiital pillar. 



