. Transactions - American Philosophical Society. 44. M- C. lii*a ,1 el oi> sloiie by :]i Sinclairs LiihTLil* NEW FRESH WATER AND LAND SHELLS. 23$ Anodonta Couperiana. Plate 20, Fig. 46. Testa ellipticd, valde inflata, gibbosd; valvulis tenuibus; natihus planulatis, undulatis; epidermidevirido-luted, obsolete radiata; margarita caruleo-albd et iridescente. Shell elliptical, very much inflated, gibbous; valves thin; beaks flattened and undulated; epidermisgreenish-yellow, obsoletely radiate; nacre bluish-white and iridescent. Hab. Hopeton, near Darien, Georgia. J. H. Couper, Esq. My C

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. Transactions - American Philosophical Society. 44. M- C. lii*a ,1 el oi> sloiie by :]i Sinclairs LiihTLil* NEW FRESH WATER AND LAND SHELLS. 23$ Anodonta Couperiana. Plate 20, Fig. 46. Testa ellipticd, valde inflata, gibbosd; valvulis tenuibus; natihus planulatis, undulatis; epidermidevirido-luted, obsolete radiata; margarita caruleo-albd et iridescente. Shell elliptical, very much inflated, gibbous; valves thin; beaks flattened and undulated; epidermisgreenish-yellow, obsoletely radiate; nacre bluish-white and iridescent. Hab. Hopeton, near Darien, Georgia. J. H. Couper, Esq. My .9, Length , Breadth inches. Shell elliptical, smooth, polished, very much inflated, gibbous and swollenfrom the beaks to the basal margin, flattened behind the beaks; basal marginmuch rounded; substance of the shell very thin; beaks flattened and finelyundulate; ligament rather long and very thin; epidermis greenish-yellow, withnumerous small rays, darker on the posterior slope, where the rays are verydistinct and capillary;

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