CYTHEREA 



Plate III. 



Species 8. (Mus. Cuming.) 



Cytherea Lamakckii. Ciith. tedd trigono-ovald, mb- 

 oblonga, crassd, concentrice rugoan, Jlavescente-albd, 

 violaccu palUdissime late radiatd, epidermide corned 

 ftihui partim indutd^ luuiild vix unlld. 



LAjrAKCK's CtTHEREA. Shell ti-iaiigulariy ovate, rather 

 oblong, thick, concentrically rugose, yellowish-white, 

 very faintly broadly rayed with violet, partially co- 

 vered with a fulvous horny epidermis, scarcely any 

 lunule. 



Merelrlx Lamarckii,Y>e&)ia.yiii,C-di. Conch. Brit. JIus. p. 39. 



Hah. China Seas. 



Of a characteristic, oblong-oval form, with the faint 

 violet rays very much dift'used over the shell. 



Species 9. (Fig. n, b, 3Ius. Cuming.) 



'HEREA ZONAEIA. Ci/lk. testd tngouo-ovatd, j)osticr 

 mihacumlnato-producld, lavigatd, albidd, castaneo pro- 

 fuHe concentrice Uneari-nndatu, epidermide corned fidvd 

 indittd, area ligamentl concaviusculd, interdmii limdd. 



„ GIRDLED Cytherea. Shell triangularly ovate, pos- 

 teriorly somew-hat acuminately produced, smootli, 

 whitish, profusely concentrically linearly waved with 

 chestnut, covered with a fulvous horny epidermis, 

 ligamentary area slightly concave, sometimes livid. 



Lamarck, Anim. sans vert. vol. vi. p. 299. 



Meretrix :onaria, Deshayes. 

 llah. China and Japan. 



This comes very near to certain forms of C. petediiuli^, 

 and is possibly a variety of that species. 



Species 10. (Mus. Cuming.) 



CvTHEEEA impudica. CytJi. testd isiibtrigono-ovatd, pos- 

 lice arcitato-productd, crassd, Ixvigald, nitente, anran- 

 tio-lacted, postice limdo-cinered, circa umbones fnsco 

 pnnctatd, marginibus a/bis. 



The immodest Cytuerea. Shell souu-wliat triangu- 

 larly ovate, arcuately produced on the posterior side, 

 thick, smooth, shining, orange crean)-colour, livid- 

 ash posteriorly, dotted with brown about the uniboes, 

 margins white. 



Lamarck, Anim. sans vert. vol. vi, p. :399. 

 L'ljtherea meretrix, Lamarck. 

 Meretrix inipndica, Deshayes. 



llab. China and the Philippine Islands. 



The warm and comparatively colourless tint of this 

 shell is no unimportant character of the .species. The 

 livid-ash ligamentary area presents a conspicuous con- 

 trast. 



JaiiUarv, 1864. 



