new MoUuscafrom South Africa. 241 



silky appearance, owing to the indistinct irregular cross-linea- 

 tion all over the surface. The apex is white ; the whorls are 

 four in number, somewhat gradually increasing ; mouth large, 

 but not so effuse as in some species ; margin of lip membrana- 

 ceous. The epidermis is slightly iridescent. 

 Six specimens. 



11. Vitrina chrysoprasina, sp. n. (PI. XIII. fig. 11.) 



V. testa conico-globosa, pellucida, viridi- cornea, tenuissima ; anfrac- 

 tibus quatuor, ventricosulis, uudique longitudina liter obscure 

 striatis, ultimo mox accrescente ; apertura lunari-rotundata, apud 

 margiuem eolumellarem paullum reflexa. 



Long. 10, lat. 11 mill. 



Hah. Pretoria. 



This very beautiful conical little species is of very delicate 

 substance and rounder than V. natalensis (Krauss) ; there is 

 also no sign of any peripheral red band. Since we first 

 received a specimen from Pretoria, in the spring of this year, 

 the species has been shown to us from no less than three 

 separate quarters — Mr. Heathcote, of Preston, and Mr. Stan- 

 don, of Manchester, both having specimens sent by their 

 South-African correspondents, and Mr. Sowerby likewise 

 supplying us with the same shell. 



12. Vitrina phcBdima, sp. n. (PI. XIII. fig. 12.) 



V. testa depresso-orbiculari, apico modice exserto, nitidissima, laete 

 cornea ; anfractibus quatuor, convexulis, ultimo in medio anguste 

 et inconspicue rubri-cingulato, ad suturas subimpressis, laivissime 

 irregular! ter plicato-striatis ; apertura lunari-oblonga. 



Long. 8, lat. 12 miU. 



Hah. Maritzburg [Burnuj? and Quekett). 



This species somewhat resembles V. pellicula, F^r., but 

 is of more transparent substance and brighter golden-horny 

 colour, with a thin red band encircling the last whorl, this 

 being very inconspicuous in some specimens. It is one of 

 the most beautiful of the South-African species. 



Several specimens. One of them is remarkably planate 

 and may prove to be a distinct species ; we prefer, however, 

 awaiting the arrival of further specimens before deciding. 



13. Planorhis {Segmentina) emican&, sp. n. 

 (PI. XIII. figs. 13,13 a.) 



P. testa depressa, nitida, la;tc fulvescente, la^vissima, spira do- 

 planata ; anfractibus tribus, ultimo rapide accrescente, ad basin 



