288 



eubgrandibus ; lateralibus longis subrectisque ; margarita alba et iridescente. 

 Hah. Chatahoochee River, Columbus, Geo. — Dr. Boyhin. 



Unio Boykinianus . Testa alata, plicata, triangulari, subcompressa ; valvulis 

 crassis; natibus prominulis; epidermide tenebroso-fusca; dentibus cardinali- 

 bus parvis, lateralibus sublongis; margarita alba et iridescente. Hah. Chata- 

 hoochee River, Columbus, Geo. — Dr. Boykin. 



Unio Edgarianus. Testa triangulari, compressa, emarginata ; valvulis 

 crassis, natibus elevatis ; epidermide lutea, valde radiata ; dentibus cardinali- 

 bus magnis, lateralibus rectis ; margarita alba et iridescente. — Hah. Holston 

 River, Tenn. — Prof. Troost and Dr. Currey. Tennessee River, at Florence, 

 Ala.— Mr. T. R. Dutton. 



Unio hiangularis. Testa obvata, inflata, postice biangulari ; valvulis tenui- 

 bus; natibus subprominentibus; epidermide tenebroso-fusca, radiata; denti- 

 bus cardinalibus subgrandibus elevatis, lateralibus subgrandibus, curvisque ; 

 margarita alba et iridescente. Hah. Cany Fork River, Tenn. — Prof. Troost 

 and Mr. S. M. Edgar. 



Unio nitens. Testa elliptica, transversa, subinflata; valvulis subtenuibus; 

 natibus subprominentibus ; epidermide tenebroso-fusca ; dentibus cardinali- 

 bus parvis elevatis ; lateralibus longis subrectisque ; margarita cuprea, 

 splendidissima, et iridescente. Hah. Long Creek, Cocke Co. Tenn. — Mr. S. M. 

 Edgar. 



Unio Holstonensis. Testa triangulari, solida, inflata; valvulis crassis ; nati- 

 bus magnis, elevatis: epidermide tenebroso-fusca, radiata; dentibus cardinali- 

 bus subgrandibus, lateralibus crassis brevibusque ; margarita alba et irides- 

 cente. Hah. Holston River, Tenn. — Mr. S. M. Edgar. 



Unio dolahelloides. Testa sub-rotunda, subinflata; valvulis crassissimis ; 

 natibus valde elevatis; epidermide fusca, radiata; dentibus cardinalibus mini- 

 mis, lateralibus brevibus rectisque ; margarita alba et iridescente. Hah. 

 Holston River, Tenn. — Mr. S. M. Edgar. 



Unio Tennesseensis. Testa elliptica, transversa, inflate ; valvulis crassis ; 

 natibus subprominentibus ; epidermide lutea ; dentibus cardinalibus magnis 

 erectisque, lateralibus magnis subcurvisque ; margarita alba et iridescente. 

 Hah. Stone's River, Tenn. — Mr. S. M. Edgar. 



Unio atro-rnarginatus. Testa plicata. oblonga, compressa ; valvulis sub- 

 tenuibus; natibus prominulis; epidermide tenebrosa; dentibus cardinalibus 

 parvis, lateralibus longis subrectisque ; margarita purpurea et valde irides- 

 cente. Hah. Chatahoochee River, Columbus Georgia. — Dr. Boykin. 



Unio B our nianus. Testa triangulari, compressa ; valvulis crassis; natibus 

 elevatis incurvis, ad apices undulatis; epidermide lutea, dense radiata; denti- 

 bus cardinalibus sub-grandibus, lateralibus subcurvis; margarita albct et irides- 

 cente. Hah. Sciota River, near Chillicothe, Ohio. — Mr. A. Bourne. 



Margarilana, Vondenhuschiana. Testa obovata, compressa, inrequilaterali ; 

 valvulis tenuibus ; natibus subprominentibus ; epidermide luteo-fusca ; denti- 

 bus cardinalibus parvis, tuberculatis ; margarita alba et iridescente. Hah. 

 Java. — G. Von den Busch, M.D. 



Margaritana Curreyiana. Testa triangulari, subcompressa, emarginata, 

 sulcata; valvulis crassis; natibus subprominentibus, ad apices undulatis; epider- 



