46 



subgrandibus, erectis corrugatisque; lateralibus crassis. Curtis, corrugatis sub- 

 rectisque ; margarita argentea et paulisper iridescente. 



Hah. — Wabash River, New Harmony, Indiana. James Sampson. 



Unio vestitos. — Testa Isevi, elliptica, compressa, inaequilaterali, postice ob- 

 tuse angulata, antice rotundd; valvulis subtenuibus, antice paulisper crassiori- 

 bus; natibus prominulis; epidermide vel lutea vel luteo-fuscd, polita, radiis 

 obliquis viridis vestitis ; dentibus cardinalibus parvis, compressis, acuminatis, 

 crenulatis, in utroque valvulo duplicibus; lateralibus sublongis, lamellatis, 

 subobliquis corrugatisque; margarita albida et splendide iridescente. 



Hub. — Ogechee River, Georgia. Major Le Conte and J. G. Anthony. 



