﻿CYRENA. 



Plate V. 



13. (Mus. Brit.) 



Ctrena Australis. Cyr. testa ovatd, cnissd, inflatd, 

 castaned, intiis postice roseo-purjiurascenii radiatd; 

 latere antico hrevi, angudato, smhacuminato, sub- 

 r,-gnh,rif.ri;n,l.,pn.pe marrihunn ,lor,ulrm nrvd 

 d.iu-rs.d ,nh^;,nnit.,; hitrrr ;„.n/,V., ttuni^lis.imo, 

 nvlini;,,, iHUujidat,,; ,ni,hn„;bi„ ncilis, dei^nssis. 



The Ausxkalun Cyrena. Shell ovate, thick, iuliated, 

 chestnut, posteriorly rayed with rose-purple 

 within ; anterior side short, narrow, rather acu- 

 ruinated, nearly regularly ridged ; slighly sinu- 

 ated near the dorsal margin by a depressed area ; 

 posterior side very tumid, radiately biangular ; 

 umboes ovate, depressed. 



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



Hah. South Australia. 



Species 14. (Mus. Brit.) 



Cvrena tenebrosa. Cyr. testd ovato-obloiigd, rom- 

 pressd ; intus postice dense purpurea, extus epider- 

 rimle fnmoso-castaned itidutd ; latere antico hrevi, 

 amjusto, obtuso, liris acutiuscidis mgato; urahonihus 

 dcpressis ; medio Icevi, complanato ; latere postico 

 producto, hito, valide hiangidatn ; margine dorsali 

 recti iisculo, suhelevato. 



The shadowy Ctrena. Shell ovate-oblong, com- 

 pressed ; deep pui-ple posteriorly within, covered 

 outside with a smoky chestnut epidermis ; an- 

 terior side short, narrow, obtuse, wrinkled with 

 rather sharp ridges ; umboes depressed, middle 

 smooth, flat ; posterior side produced, broad, 

 with two strong angles, dorsal margin somewhat 

 straight, rather raised. 



Hinds. Voy. SuJphur. 



Hub. Ffcjee Islands. 



Species 15. (Mus. Brit.) 



.A viOLACEA. Cyr. testd ovato-ohlongd, suhcom- 

 iri'sid, castaned, intus violaceo suffusd ; latere 



antico liris distinctly, iiniiiiiiUi^ iiilrrrnhiiiy. .i,l 

 medium, extensis sculptu, iiiiir</i„r ,h,rx'ili drrliri ; 



laterepOstirMjrr'idiitiii^nli.irHir niiUiitiiii tyiniuiiihili,- 

 margine dorsnJi ihi-nt,:, ,ir,-ii,tti,, muniiin n-iilmli 

 pauli) excavato. 

 The violet Cyrena. Shell ovate-oblong, rather com- 

 pressed, chestnut ; suffused with violet within ; 

 anterior side sculptured with distinct ridges, 

 some intercalated, extending to the middle, dorsal 

 margin sloped ; jiosterior side produced, with 

 three obscure radiating angles ; dorsal margin 

 raised, arched, ventral margin a little excavated. 

 Lamarck. Anim. s. Vert. Chenu : lUus. Conch. 



PI. VII. f. 5. 

 Hah. Indian Ocean. 



There can be little certainty as to the identification 

 of this Lamarckian species. The specimen figured 

 resembles in form and compression the one figured 

 by Chenu as Lamarck's shell. It is, however, nn- 

 coated. 



Species 16. (Mus. Brit.) 



Cyrena fortis. Cyr. testd snhcompressd, subovatd, 

 crassd ; intiis denlibus latcralihns subcequalibus, 

 elongatis, serraiis, cardinalihus hifidis armatd ; 

 extiis epiderniide viridi-fuscd, crassd, suhrugosd 

 indutd ; latere antico sulcis erebris sculpto ; latere 

 postico sidcis distantibus rvgato ; late angulato, post 

 angidum liris divergentibus subnodosis rugato. 



The strong Cyrena. Shell rather compressed, i-ather 

 oval, thick ; armed within with rather equal 

 elongated, serrated, lateral and bifid cardinal 

 teeth, covered outside with a greenish-brown, 

 rather rough epidermis ; anterior side sculptured 

 with numerous ridges ; posterior side wrinkled 

 with distant sulci ; broadly angular, behind 

 the angle wrinkled with diverging, rather nodose 

 ridges. 



Prime. Proc. Zool. Soc. 1860, p. 320. 



Hah. New Caledonia. 



