﻿CYRENA. 



Plate XIV. 



coiii-eutriiy riiydta; fjn 



i,,Hha,n-s,:n:„raln; lal,;; 

 tnitwati}; uinboiiibus pre 



Species 0.".. (^fus. Brit.) 



CykENA RIVALIS. Cijr. t.csfa ^itHrnjnthi , siilidd, altd, 



rcijidariirr liris apj)r".n',,Hili^ ail hiiera evanidis 



e,.i.h, ■„,:.!,' ,l,;i.e oUvaeeo. 



a„i;,-o rolinnlato, infra 



hiciitilH^, snhnw;^. 



The river Cyrena. Shell subtrigonal, solid, high, 

 regularly concentrically wrinkled with ajipioxi- 

 mate ridges, obsolete at the sides ; covered with 

 a dark blackish-olive epidermis ; anterior side; 

 roniided, excavated near the umboes ; posterior 

 side angular, obliquely truncated ; umboes ])ro- 

 niinent, rather pink. 



Von Busch. I'hil. Abild. III. 110, PL :!. 1840. 



]M,. Java. 



■</,/,■ 



JViul!.<, ail lal,',:, ,;,„i;,i„ 

 vwlaccd, ad lal.,-., /„„.; 

 antico Irevi, luiui.lif^, ,.,.,. 



(Mus, Sowerby.) 



I, ft,', ;/r;.sv,;, /-^sr,/, tuml.lls- 

 i:.l.:, all.!, Ill-Is ,;;'l,rls, )„■„. 

 „ll„„l.< ,-„.,., I.!, ;„l,)s j,„!li,li 

 l.n-adlat.l ; lal.mj 

 ni„b.,„fs cxcnvata; 



latere jM.-'tiro pi-.-.h,,-!.., siil,.,,-,, minalo, ainjal.ito, 

 ad tenalnnm .••■iihlrintral.i, f,iilir,,^tralo. 

 The neat C'yrexa. Shell greyish-brown, very tumid, 

 subtrigonal, solid, high, wrinkled with clo.se, 

 deep ribs continued at the sides, pale violet 

 within, with a purple ray at each side ; anterior 

 side short, very tumid, excavated at the umboes ; 

 posterior side produced, slightly acuminated, 

 angular, subtruncated, and beaked at tlie end. 



SOWEKBY. 

 Eah. ? 



I have seen only one specimen of tliis species. Its 

 locality is unknown. 



Species (37. (Mus. Haiiley.) 

 Cyresa gracilis. Cijr. tesld Itimldd, deprcKm, ovald, 

 tenni, liris irreijularihns, ■majiisculis, dLstaiitlhitu, 

 concentricis,ad latent obsoleUs,rmjatd, ej.idermide 



anrantio-subvirldl indidd, iiili) 



!""!•' 



last I 



Ir, 



ad iiiarginon car- 

 .1,1,1 jiaridd.; latere 

 il, „.■„„,;, I. ,t,., latere 



antler.,! I,, i.lo, 

 roseis, obtiists. 



The SLENDER Cyrena. Shell tumid, depressed, ovate, 

 thin, wrinkled with irregular, i-ather large, 

 distant, concentric ridges, obsolete at; the sides, 

 covered with a greenish-orange epidermis, inside 

 l)urplc at the hinge margin, yellowish towards 

 the margin ; posterior side jtroduced, scarcely 

 truncated, subacuminated, anterior side rounded, 

 excavated beneath the umboes ; umboes pinkish, 

 obtuse. 



Prime. Amer 

 18<i-2. 



ITab. Java. 



Journal of Conchology, X. 389. 



Species GS. (Mus. Brit.) 

 Cyrena bullata. Cyr. testd alld, tumidissimd, brcvi- 



ridd 



ide rurjnssd ,tenuiter striata fii 



fused hidutd ; latere antico brcvi, subrotundo ; 

 lati.re poMico magis prodwcto, obtuse angulato, 

 manjine d(rrsali declivi ; mnbonibics ovatis, obtu- 

 slt;.ii),iis; margine ventrali convexo. 

 The i;ullated Cyrena. Shell high, very tumid, 

 rather short, covered with a rough, finely striated 

 smoky-brown epidermis ; anterior side short, 

 rather round ; posterior side more produced, 

 obtusely angular ; dorsal margin sloped ; nmboea 

 oval, very obtuse ; ventral margin convex. 



SOWERBY. 



Cijrena iiisignls. Deshayes. 

 Hah. California. 



Having already figured a species of Cyrena {Bn- 

 tis.^a) under the name of ingiguis, Deslwije:<, we cannot 

 repeat the name in a second division of what we 

 regard as the same genus. 



Species G9. (Mns. Brit.) 

 Cyrena cyreniformis. Cyr. testd crassd, altissimd, 

 subtrigond, tumidd, subobliqud, distanter riigatd, 



