90 



Messrs. J. C. Melvill and J. H. Ponsonby on 



XV. — Desc7'iptions of Fifteen new Species of South- African 

 Terrestrial MoUusca. Bj James Cosmo Melvill, M.A., 

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



[Plate I.] 



Since our last communication * a fair amount of additional 

 material has been kindly forwarded by various correspondents, 

 and one or two more species from tlie rich stores of Mr. E. L. 

 Layard. 



1. Nanma morrumhalensis, sp. n. (PI. I. fio-. \\ 



N. testa olivaceo-cornea, pertenui, planulata, obtecte et angustissime 

 umbiUcata, parum uitente ; anfractibus quinque, undique irreo-ii- 

 lariter longitudiualiter rugoso-striatis, ultimo rapide accres- 

 cente, spira conico-depressa ; apertura ampla, ovato-Iunari ; 

 peristomate pertenui, simplici, apud umbilicum pauUum retlexo. 



Long. "To, lat. 1-30 unc. 



Hah. Mount Morrumbala, Central East Africa {E. L. 

 Layard) . 



A large, somewhat transparent, horny shell, but little 

 shining, throughout longitudinally striately wrinkled, the 

 * Ami. & Mag. Nat. Hist. ser. 6, vol. xii. pp. 10;.5 et sqq. 



