156 PROCEEDINGS OP THE ACADEMY OF 



Unio flavidus. 



Testa lsevi, triangulari, subinflata, ad latere planulata, insequi- 

 laterali, postice obtuse angulata, antice rotundata ; valvulis 

 subcrassis, antice crassioribus ; natibus proruinentibus, recurvatis, 

 ad apices minute undulatis ; epidermide flavida, radiis interruptis; 

 dentibus cardinalibus parvis corrugatisque ; lateralibus curtis, 

 subcrassis subcurvisque ; margarita argentea et iridescente. 



Hab. Clinch River, Anderson Co., E. Tenn. Miss A. E. Law. 



Unio pauciplicatus. 



Testa plicata, subrotunda, ventricosa, valde ina?quilaterali, 

 postice carinata, antice rotundata ; valvulis crassis, antice crassi- 

 oribus ; natibus prominentibus, tumidis, recurvatis, ad apices 

 minute undulatis ; epidermide rufo-fusca, eradiata ; dentibus 

 cardinalibus crassis, elevatis, sulcatis crenulatisque; lateralibus 

 longis, lamellatis, corrugatis curvisque ; margarita argentea et 

 valde iridescente. 



Hab. Austin, Texas. Prof. C. G. Forskey, Civil Engineer. 



Unio vesicularis. 



Testa lrevi, elliptica, inflata, valde inaequilaterali, postice et 

 antice rotundata, valvulis crassiusculis, antice crassioribus; na- 

 tibus prominulis ; epidermide tenebroso oliva, obsolete radiata ; 

 dentibus cardinalibus parvis, sulcatis, in utroque valvulo duplici- 

 bus ; lateralibus sublongis, lamellatis subrectisque ; margarita 

 albida et valde iridescente. 



Hab. Lake Ocheechobee, Florida. Dr. Budd and C. M. 

 Wheatley. 



Unio conspicuus. 



Testa lsevi, elliptica, subinflata, intequilaterali, postice obtuse 

 angulata, antice rotundata ; valvulis crassis, antice crassioribus ; 

 natibus prominulis, ad apices undulatis ; epidermide rufo-fusca, 

 perradiata; dentibus cardinalibus parviusculis, crenulatis, com- 

 presso-conicis, in utroque valvulo duplicibus ; lateralibus prselon- 

 gis, lamellatis, parum curvatis ; margarita conspicua, persalmonia 

 et formoso-iridicente. 



Hab. Yadkin River, near Salisburg, N. C. C. M. Wkeatle}-. 



Unio Yadkinensis. 



Testa lsevi, oblonga, coinpressa, valde inaequilaterali, postice 

 subbiangulata, antice rotundata; valvulis crassis; natibus pro- 

 minulis ; epidermide tencbroso-fusca, eradiata ; dentibus cardina- 



