﻿C V R E N A. 



IX. 



(//(■( 



Species 32. (Mus. Sowcrby.) 



Cyrena OLIvacea. Cijr. testa teniii, stnun 



riili,xuhtri<jond,ii-Hdulatim striatn, inliis purlin rra, 

 ,J.}di}in.f cardinaUhus parvif, lateral il/iis aiiliris 

 lii-ei'ii'iaruUs ; latere antico declivi ; latere pcsliri} 

 atKjnhitd, margine dorsali declivi, laferaU <ihliijw 

 truiirato, infra acuminata, margltir ciKtrnh ante 

 aiiijulum e,rcavato, wnhonibus siihcriifralihiis. 



The olivaceous Cyrkna. Shell thin, .straw-coloured, 

 greenish, snbtrigonal, undulately striated, inside 

 purple, cardinal teeth small, anterior lateral 

 rather short ; anterior side sloped, posterior 

 side angnlar, dorsal margin sloped, lateral ob- 

 liquely truncated ; acuminated below ; ventral 

 margin excavated in front of the angle ; uiulioes 

 nearly central. 



Cari'knter. ? MS. 



Hah. California. 



skIc rath. 



minated 

 D'OunuiNV. - 

 Hah. Y 



Species 33. (Mus. Brit.) 



CvUKXA OnscUKA. Cijr.ttsid eras.--;', Iriij 

 li.l.miidr ,n,ii;i 



, epu: 



^uh, 



2)re.<'>^d,eh rati. 



striata ii,<h,ld ■ hife 



area liiuularl impresso ; latere postieo augulato, 



valde declivi, margine ventrali ante angulum suh- 



e.ecavato. 



The ohscl-RE CYliENA. Shell thick, trigonal, some- 

 what compressed, much elevated, covered with 

 a black, thick, closely striated epidermis; anterior 

 side short, rather excavated, impressed with a 

 lunular area; posterior side angular, much sloped, 

 ventnil margin a little hollow in front of the 

 angle. 



PiM.MK. Proc. Zool. Soc. 18G(>, p. 321. 



Hah. New Granada. 



Species 34. (Mus. Brit.) 



CykENA FoNTAlXEI. Ci/r. testa aJtissi mil, suhtrigiaid, 

 rrassd, carnyressd : ilrnsi: ra,<taind, .striata; latere 

 antira hrevi, derliri, „un;ji„e rrafrali rotunda; 

 itmlioiiilms eleratis .-adiacuminntis ; latere pusiico 

 sulnicufi; augulato, vald'u declivi, itifra acuminata. 



Fontaise's Cyrena. Shell very high, subtrigonal, 

 thick, compressed ; deep chestnut, striated ; an- 

 terior side short, sloped, ventral margin rounded ; 

 iimbocs elevated, rather acuminated; posterior 



Species :!■-.. (Mus. Brit.) 



Cyrena VE.NTl:h'n,v\. I',l,: !■ ^ir, ,nl,un,l.;,cnlss,1,tll,„;da, 

 pallidr sirannn.,;, l.rrigaU'j; latrrr a ,J i,:. hrrri, 

 rotunda; lalrrr /»«/;.•„/„■,„/»,■/„, no, njiia dorsali 

 drrliri, margin,- trrmno'li hn„r.,l,.. Jn/ra snhrn. 

 nealo. 



The vextkicose Cyrena. SIhII Miliovate, thick, 

 tumid, pale straw, smoDlli ; aiil<i-iiir side .short, 

 rounded; posterior side produc-cil, dorsal margin 

 sloped, terminal margin slightly ti-unciited. 



Deshayes. Proc. Zoul. Soc. isr.-t, p. 1 o. 



Hah. Australia. 



Species 30. (Mus. Brit.) 



Cyrena ESSINGTONENSIS. Ggr. testd ovatd, castan.rd, 

 distanter ciaa-pntricefimhrinfo-striatd ; latere antira 

 hrevi, derliri, ari'd Innnlari inqireSSO; latere postim 

 jjrodurlo^ nia rifini' dnrxali a rcuato ; margine ven- 



trali cone: 



-uhonihus de 



The Port-Essinuton Cyrena. Shell ovate, chestnut, 

 distantly concentrically fringe-striated ; anterior 

 side short, sloped, impressed with a lunular area ; 

 posterior side produced, dorsal margin arched ; 

 ventral margin convex ; umboes depressed. 



Deshayes. Proc. Zool. Soe. 1854, p. 19. 



Hah. Port-Essington, Australia. 



Species 37. (Mus. Brit.) 



Cyrena oI!U)N.ia. Cyr. testd obhmgo.or.tld, cras.-<d, 

 nndnlati-m. suhd-i.-^tanfer striatd, slramiio o-ruhes- 

 cenh; latere aniico hrrrinsculo. .nhtus nmJ.ones 

 cecavato, and Inmdari imfa-r.so ; lotcr,: jiosUco 

 prodncto, oh<rnr: an-jnlal... ad trraunnm trnnralo, 

 margine dnr^ali d-rliri. 



The OBLOXii Cyrena. Shell oblong-ovate, thick, rather 

 distantly wavily striated, reddish straw, anterior 

 side rather short, hollow under the umboes, im- 

 pressed with a lunular area ; posterior side 

 produced, with an obscure angle, truncated at 

 the end ; dorsal margin slf)ped. 



De.'^hayes. Proc. Zool. Sue. 18.j4, p. 341. 



Eah. ? 



