BIVALVE SHELLS. 227 



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



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

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



C\Tena fuscata, Lamk. An. s. Vert. v. 552. no. 4, exclus. var. 

 CjTena fluviatilis, Phil. Abbild. Conch, p. 3. no. 5. pi. 1. f. 5? 

 Cyrena Manilensis, Phil. Zeits.filr Malac. 1841, p. 163. 



Hab. In flumine emporium Canton, Chinse prseterlabente 



{Miiller). 



22. CORBICULA ORIENTALIS. B.M. 



C . testa rotundato-ovata, subtrigona, subaequilaterali, 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. 2/3. no. 2. 

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

 Phil. Abbild. Conch, p. 1. no. 2. pi. 1. f. 2. 



Hab. In Cbina; in fluvio emporium Canton prseterlabente 

 frequentissima ; pro calce uritur {Phil.). 



23. CORBICULA NITENS. 



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

 transversim striata, olivaceo-flava ; extremitate postiea sub- 

 rosti-ata fusca ; dentibus lateralibus elongatis sti-iatis. 



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

 Abbild. Conch, p. TQ. pi. 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 obscm'e truncata ; sulcis ad latus posticum evanidis ; 

 umbonibus obtusis, brevissimis decorticatis ; vahas tenuibus, 

 intus atro-violaceis ; cardine angusto, sajpius candido, ti-iden- 

 tato ; dentibus lateralibus angustis, acutis, tenuissime striatis. 



Cyrena compressa, Mousson, MS S. fide Morelet. 



Hab. In rivulis insulse Javanse. 



25. CORBICULA MoussoNi. B.M. 

 C. testa ovato-transversa, convexiuscula, inaequilaterali, transver- 



