﻿CYRENA.— Plate XII. 



Species 66. (Mns. Brit.) 



CVRESA FLUMINEA. Cijr. tc:<id .•^iihlrirjom'i. nlhi. fen: 

 crquilateraU, hitii. ipiilrmiiJi ^Khniinnitiii hrviijntii 

 mdutd; UrkilUtnuiil.ns r„i;.i;.-< nojaf.; ; inuhnui. 

 hus elevatis, suhnriniiii/ali's, ninnjiii,' dnrsali 

 iitrriiqiic (h'clivl ; latere poslicu ohscxire anguJato, 

 (111 trrwiiuim truncato ; dentihvs lateralibus don- 

 .jatis. 



The eivee Cteena. Shell trigonal, high, nearly equi- 

 lateral, broad, covered with a smooth, somewhat 

 orange epidermis, wrinkled with distant, strong 

 ridges ; umboes raised, slightly acuminated, 

 dorsal margin sloped on each side ; posterior 

 side with an obscure angle, truncated at the 

 end ; lateral teeth elongated. 



liAMAitrK. Anim sans Vert. V. VI. p. 274. 



H,<}>. China, &<■. 



Species 57. (F. a, h, Mus. Hanley and Brit.) 

 Ctrena pusilla. Cyr. testa parva, ovatd, alhidd, vcl 

 purpurascenti, vel fmca-flavidd, subcompressd, 

 medio tumidd, ienuiasime mgatd ; latere antico 



hreviiotculo, latere posticn marjis prndiwto, suhtnui- 

 cato. 



The dwarf Cteesa. Shell small, oval, whitish or 

 purple, or brownish-yellow, rather compressed, 

 tumid in the middle, very finely wrinkled : 

 anterior side rather short ; posterior side more 

 produced, slightly truncated. 



Philippi. ? Mus. Brit. 



Hal). Upper Nile, Syene. 



Species 68. (Mus. Brit.) 



Cyeena compeessa. Cyr. testa suhovatd, compressd, 

 concentrice leviier rugatd, ad latera Icevigata, epi- 

 derm ide pallidd induid ; latere antico hreviusculo, 

 rotimdo ; latere postico angulato, ohlique truncato, 

 margine dorsali valde declivi. 



The flattened Cyeena. Shell subovate, compressed, 

 concentrically slightly wrinkled, smooth at the 

 sides, covered with a pale epidermis, anterior 

 side rather short, round, posterior side angular, 

 obliquely truncated, dorsal margin much sloped. 



MoussoN. Deshayes, B. M. Cat. 1854. 



Hah. Java. 



