BIVALVE SHELLS. 227 



Venus fluviatilis, Chemn. Conch. vi. 320. pl. 30. f. 321. 



Wood,Ind. Test. pl 8. f. 115. 

 Venus, Schrot. Einl. iii. 158. no. 12. 



Cyrena fuscata, Lamk. An. s. Vert. v. 552. no. 4, exclus. var. 

 C}Tena fluviatilis, Phil. Abbild. Conch. p. 3. no. 5. pl. 1. f. 5? 

 Cyrena Manileusis, Phil. Zeits.fiir Malac. 1841, p. 163. 



Hab. In flumine emporium Canton, Chinaj prseterlabente 

 (Muller). 



22. CORBICULA ORIENTALIS. 15. M. 



C. testarotundato-ovata, subtrigona, suba^quilaterali, solida; api- 

 cibus erosis, obtusis ; striis transversis regularibus remotis ; 

 epidermide olivaceo-atra ; dentibus cardinalibus duobus in 

 valvula dextra ; dentibus lateralibus elongatis striatis. 



Cyrena orientalis, Lamk. An. s. Vert. v. 552. no. 2, exclus. var. 

 Desh. in Lamk. ed. 2. vi. 273. no. 2. 

 Anton, Verz. der Conch. p. 13. no. 496, excl. syn. 

 Phil. Abbild. Conch. p. 1. no. 2. pl. 1. f. 2. 



Hab. In China; in flmdo emporium Canton prseterlabente 

 frequentissima ; pro calce uritur {Phil.). 



23. CORBICULA NITENS. 



C. testa trigona, inaequilaterali, tenui, tenuissime et confertissime 

 transversim striata, olivaceo-flava ; extremitate postica sub- 

 rostrata fusca ; dentibus lateralibus elongatis striatis. 



Cyrena nitens, Philippi in Menke, Zeits.fiir Malac. 1844, p. 163 ; 

 Abbild. Conch. p. IQ». pl. 1. f. 4. 



Hab. China. 



f. Species insulares. 



24. CORBICULA COMPRESSA. 



C. testa ovato-trigona, transversa, subaequilaterali, fusca, trans- 

 versim tenue et regulariter sulcata; antice breviore, obtusa, 

 postice obscure truncata; sulcis ad latus posticum evanidis ; 

 umbonibus obtusis, brevissimis decorticatis ; valvis tenuibus, 

 intus atro-violaceis ; cardine angusto, sapius candido, triden- 

 tato ; dentibus lateralibus angustis, acutis, tenuissime striatis. 



Cyrena compressa, Mousson, MSS. fide Morelet. 



Hab. In rivuhs insulaj Javanaj. 



25. CORBICULA Moussoxi. B.M. 

 C. testa ovato-transversa, convexiuscula, ina;quilaterali, transver- 



