230 BIVALVE SHELLS. 



32. CORBICULA AU8TRALIS. B.M. 



C. testa ovato-oblonga, striata, subdcpressa, tenui, fragili, fusco- 

 virente, intus aurantia, striis tenuissimis, transversabbus. 



Cyrena aiistralis, Desh. Encycl. Meth. Vers, ii. 50. no. 12 ; in 



Lamk. An. s. Vert. ed. 2. vi. 278. uo. 16. 

 Wood, hid. Test. Suppl. 2. pi. 14. f. 57. 



Var. ^. Testa lutesceute. 



Hub. Nova Ilollaiidia. 



33. CoRBicuLA Nepeanensis. B.M. 



C. testa regulariter transvcrsim ovata, tenui, turgidula, a;quilate- 

 rali, epidermide nitente flavicaute vestita, intus pallida auran- 

 tia, transversim striata, striis distantibus, in latere antico pro- 

 fundioribus, lateribus jcqualiter obtusis; urabouibus pai-^is, 

 obtusis, erosis ; cardine angusto, dentibus cardinalibus ina^qua- 

 libus tribus, valde divergentibus, lateralibus angustissimis, 

 asqualibiis, obsolete teuuissime striatis. 



Cyrena Nepeanensis, Less. Voy. de la Coq. Zool. ii. 428. pi. 13. 

 'f. 14. 



Hab. Fluvius Nepean dietus Nova; Hollandia;. 



34. CORBICULA SEMISULCATA. 



C. testa transversa, ovato-subtrigona, inaequilaterali, tumidula, 

 solidiuscula, transversim incremento irregulariter substriata, 

 antice regulariter sulcata ; epidermide squalide ^^^escente ves- 

 titn, aliquando zonulis transversis nigrescentibus interrupta, 

 intus profunde violacea; cardine trideutato, dentibus fere 

 ajqualibus, lateralibus validis, brevibus, postico cardine re- 

 mote ; sinu ])allii postico brevi, angusto, triaugulari, acuto. 



Corbicula semis ulcata, Desh. Proc. Zool. Soc. 1854. 



Hab. In fluvio Victoriae Novae Hollandise. Coll. Cuming. 



h. Species AmericcB meridionalis. 



35. Corbicula qbsoleta. 



C. testa ovato-trigona, obli(]ua, tumidula, in.nequilaterali, solidi- 

 uscula, transversim irregulariter striato-sulcata ; epidermide oli- 

 vaceo vestita, zonulis obscurioribus interrupta, utroque latere 

 dcclivi, antice lata, breviori, obtusa, postice subangulata ; um- 

 bonibus ])roniinentibus, obliquis ; cardine angusto ; dentibus 

 cardinalibus tribus minimis subparallelis, dentibus lateralibus 



