On new Mollu^ca from South Africa, 237 



XXVIll. — Descriptions of Thirteen new Species of Terrestrial 

 and Freshivater Mollusca from South Africa. By James 

 Cosmo Melvill, M.A., F.L.S., aiid John Henry 

 PONSONBY, F.Z.S. 



[Plate XIII.] 



In continuation of our last ])aper {vide Ann. & Mag. Nat. 

 Hist. 1892, vol. ix. p. 94) we now liave the pleasure to present 

 a fifth contribution, which shows how energetically our various 

 correspondents and friends are working in the cause. We 

 may add that we have in preparation a special paper dealing 

 with new forms of the genus Ennea and other Pupidaj. 



1. Helix (j^i-ope) Triyneni, sp. n. (PI. XIII. fig. 1.) 



B. testa profunda umbilicata, brunnea, depresso-orbiculari, solidi- 

 uscula, supra sericea, confertim striate- costulata, ad basin nitida, 

 eublffivi, striis obscuris, spira modice exserta ; anfractibus quatuor, 

 ultimo rapide accroscente ; apertura rotundo-lunari ; peristomate 

 simplici, ad basin et marginem columellarem paullum reflexo. 



Long. 17, lat. 22 mill. 



Hab. " S. Africa " {R. Trime?i). 



A large species of dull brown colour allied to II. (jErope) 

 eumacta, described in this paper, and forming a link between 

 the caffra and vernicosa sections. 



In general aspect this species is more akin to caffra^ but 

 the polished base recalls vernicosa^ buUacea, &c. 



We have no exact record of its locality. There are three 

 specimens, of which one is immature. 



2. Helix i^JErope) eumacta, sp. n. (PI. XIII. fig. 4.) 



H. testa umbilicata, compacta, solidiuscula, albida, semipellucida^ 

 undiquo epidorraide corneo-olivacea, radiatim disposita, iiiduta, 

 globulosa ; anfractibus quatuor, convexis, confertim longitudinaliter 

 tenuistriatis, ad suturas depressis, ultimo ad basin viridi-suffuso ; 

 apertura lunari-ovata, intus lactca ; peristomate tenui, einiplici, 

 apud umbilicum triangulatim reflexo. 



Long. 24, lat. 30 mill. 



Hah. Natal {Crauford). 



A large conspicuous compact shell, of thicker substance 

 than H. {u3Erope) caffra (Reeve), with the whorls not so. 

 elegantly striated, nor so effuse as regards the aperture. 



Two specimens. 



