424 PROCEEDINGS OF THE ACADEMY OF 



DESCRIPTION OF THREE NEW SPECIES OF TJNIONES OF THE 



UNITED STATES. 



BY ISAAC LEA. 

 Dnio Dooleyensis. 



Testca lievi, oblonga, valde compressa, valde inaequilaterali, pos- 

 tice biaugulari, antice rotundata; valvulis subtenuibus ; natibus 

 prominulis ; epidermide luteo-oliva, obsolete radiata ; dentibus 

 cardinatibus parvis, in utroque valvulo duplicibus; lateralibus 

 lougis, lamellatis rectisque ; margarita livida et iridescente. 



Hab. Dooley Co., Georgia, Rev. G. Wliite; Abbeville, S. C, 

 Dr. Barratt. 



TJnio invenustus. 



Testa lajvi, oblonga, subcompvessa, valde inaequilaterali, postice 

 subbiangulari, antice rotundata ; valvulis crassiusculis, antice ali- 

 quanto crassioribus ; natibus prominulis ; epidermide tenebroso- 

 fiisca, obsolete radiata ; dentibus cardinalibus parviusculis sulca- 

 tisque ; lateralibus sublongis, curvatis lamellatisque ; margarita 

 livida et iridescente. 



Hab. Columbus, Geo., G. Hallenbeck ; Russel Co., Geo., Dr. 

 I^eisler ; Irwin's Creek, North Carolina, C. M. Wlieatley. 



TJnio Gesnerii. 



Testa laevi, suboblonga, inflata, inaequilaterali, postice subbian- 

 gulari, antice oblique rotundata ; valvulis subcrassis, antice cras- 

 sioribus ; natibus prominulis ; epidermide tenebroso-fiisca vel 

 radiata vel eradiata ; dentibus cardinalibus crassiusculis, in utro- 

 que valvulo duplicibus sulcatisque ; lateralibus longis, crassis 

 lamellatisque ; margarita livida et iridescente. 



Hab. Uchee River, near Columbus, Geo. Dr. J. Lewis. 



