S T R .E A.. 



Species : 



(Fig. n, Mus. Brit.; Ii, Mus. Taylor.) 



OsTii^A IMBRICATA. Os^t. testi'i foliuad, teiiiii, lii.r<' 

 radiatim plicatd, 7-osea, uiamlis jmrpureis imym's 

 irreqularibus ornatd, vel pallide ftdvA super plicas 

 nibrnfusco tinctd : plifin mediank marjuis, bifurcntii', 

 angulatim mtuwldli.'', ml •uii/n/ns iiiihriratiin tiihu- 

 losis ; valvA iiijirifri /'f i/m ul, r/d/inrcii. 



The imbuiCATED Ovsti.u. Shell t'oliace«ms, thin, loosely 

 radiately plicated, pink, ornuiiu'iited with large 

 purple irregular spots, or ]>ale fawn tinted with 

 reddish brown ; middle folds large, bifurcated, 

 angularly rounded, with inibrii-ated tuhes at the 

 angles ; lower valve often foliaeeotis. 



Lamarck. Anini. sans vert. (Jstra^a, No. 4(1. 



Bab. China. 



Like Ostrcea f/i/otis, but of looser and less solid tex- 

 ture, variegated in colours, and the dee]i central plicse 

 less angular. 



R])ccics ."7. (Mus. Ilanley.) 



OsTR^A Ctrnl'sii. OsI. tratd nb/onr/o-subtrlgond, 

 pallide rorncil, phtiinhitim Kijiiiinnhitd, pondmm ; 

 vdlvii .•'iiii.':trd '■ra>'si^siind, exttis landmitiin. fulinced: 

 rurdiii, ,l<i>n/iili,, lato, in mediuin pi-njaiidn : 

 imj)ii^.<iirii,i' iiiiisfHiiiri rimximd, subrcinfunnl. 

 TiiK CoRsiCAN O.stRjEA. Shell oblong subtrigonal, pale 

 horny, flatly squamose, ponderous ; left valve very 

 thick, with leafy lainiiue outside ; hinge elongated, 

 wide, deep in the middle ; muscular impression 

 very large, somewhat reniform. 

 Payradau. MoUusques de I'lsle de Corse. 

 TIab. Island of Corsica. 



One of the numerous forms which may be ultimately 

 resolved into the Ostnra Edulis, but which, on account 

 of its very laminated structure and heavy substance, 

 taken in conjtmction with the development of the ex- 

 traordinarily broad hinge, may usefully have a specitic 

 designation applied to it. 



September, 187. 



