﻿CYRENA.— Plate XVI. 



low Tinder the nmboes ; umboes leaning to the 

 front, depressed ; posterior side produced, acu- 

 minated, margin sloped in an arch. 



Dkshaves. Proc. Zool. Soc. 1854, p. 342. 



Hah. f 



Species 87. (Fig. a, h, Mus. Brit.) 



CyiiEXA TAEIEGATA. Cijr. testa alti'i, mhrotiinil.i. fniiii. 

 nuhvirkU et nhjrd, vel subaurantid, lu'lndh radi- 

 isque variegatd, tenuisgimi; striata, vi.r ruijatd, 

 latere postico irrodiwto , rofuiuh, latere anticu hre- 

 iiissimo. 



Thk variegated Cyrena. Shell high, rather rounded, 

 thin, greenish or black, or rather orange, varie- 

 gated with clouds and rays of purple, very finely 

 striated, scarcely wrinkled, posterior side pro- 

 duced, rounded, anterior side veiy short. 



Dkshavks. MS, Mus. Cuming. 



]lat,. La Plata. 



Species 88. (Mus. Sowerby.) 



Cyeena Mallacensis. Gyr.festd tenui, subrhoiithnided, 

 fumoso olioaced, nitenti, rcgulariter, distanter, acute 

 ruyatd, intits alba; latere antico brevi, decUri ; 

 latere postico produdo, obliqiie truncato. 



The Malacca Cyrena. Shell thin, subrhomboidal, 

 smoky-olive, shining, regularly, distantly, 

 sharply wrinkled, white within ; anterior side 

 short, sloped ; posterior side produced, obliquely- 

 truncated. 



Deshayes. Proc. Zool. Soc. 1854, p. 343. 



Ilab. Malacca. 



Species 89. (Mus. Hanley.) 



Cyrena nitens. Cyr. testa subaurantid, nitenti, com- 

 pressd, snhdepressd, oblique irigond, tenuiter sul- 

 catd, intus et ad umhones subrosed ; latere antico 

 brevi, rectviiseulo, valde declmi ; latere postico 

 oblique producto, margine dorsali longe dedivi, ad 

 margiuem ventralem aeuminato ; margine vetitrali 

 recti itsculo. 



The shining Cyrena. Shell rather orange, shining, 

 compressed, rather depressed, obliquely trigonal, 

 finely grooved, rather pink at the umboes ; 

 anterior side short, rather straight, much sloped ; 

 posterior side obliquely produced, dorsal margin 

 with a long slf)j)e, acuminated at the ventral 

 margin; ventral margin rather straight. 



Deshayes. MS. Cum. Coll. 



Eab. ? 



