BIVALVE SHELLS. 225 



e. Species Chinenses. 



15. CORBICULA WOODIANA. 



C. testa subtrigona, subinflata, raicante, subacquilaterali, trans- 

 versim riigata ; valvulis crassis ; natibus maguis et rotundatis ; 

 dentibus cardinalibus subbifidis, lateralibus longis, serratis 

 rectisqne ; margarita alba. 



Cyrena Woodiana, Lea, Trans. Amer. Phil. Soc. v. 1 10. pi. 18. f. 55; 

 Observ. on the Genus Unio, i. 222. pi. 18. f. 55. 

 Wood, Ind. Test. Siippl. 2. pi. 14. f. 58. 



Hab. In rivulis Chinensibus prope Canton. 



16. CORBICULA GRANDIS. 



C. testa orbiculato-trigona, solida, tumidula, inaequilaterali, trans- 

 versim ii'regulariter rvigosa, antice sulcis magis regularibus 

 exarata ; latere antico breviore, late arcuato, postico magis at- 

 tenuato; epiderraide nitidissima nigrescente vestita,ad margines 

 flavescente, postice squamosa ; valvis intus pallide flavis ; car- 

 dine incrassato, tridentato, dentibus approximatis, lateralibus 

 brevibus, crassis, irregvdariter striato-denticulatis. 



Corbicula grandis, Desk. Proc. Zool. Soc. 1854. 



Hab. Cbina? Coll. Cuming. 



17- Corbicula similis. B.M. 



C. testa trigona, paululum latiore quam alta, depressiuscula, sub- 

 sequilaterali, transversim tenue sulcata, postice sulcis eva- 

 nescentibus ; latere antico rotundato, obtuso, postico produc- 

 tiore cuneiformi, angulato; umbonibus prominentibus, recurvis, 

 oppositis, decorticatis ; ligamento brevi, angusto, partim im- 

 merso; epidermideviridi-fuscescente ad margines glaucescente ; 

 valvis intus albis, ad margines lutescentibus, cardine tridentato, 

 n5miphis basi irregulariter granoso-rugosis ; dentibus lateralibus 

 praelongis, angustis, transversim late profundeque sulcatis. 



Venus similis. Gray in Wood, Ind. Test. Suppl. 1. pi. 2. f. 5. 

 Cyrena similis. Gray in Griff. Anim. Kingd. pi. 20. f. 2. 



Hab. China? 



18. Corbicula Largillierti. 



C. testa rotundato-trigona, subsequilaterali, compressiuscula, pos- 

 tice angustiore, svibangulata ; striis transversis confertissimis ; 

 epidermide olivacea, apicibus et pagina interna violaceis ; den- 

 tibus lateralibus elongatis, striatis. 



10** 



