325 T^"^ Oligocene of the Soitthern United States 15 



" undata Lmk., 

 Tellina Be7iedeni Nyst & West, 



" {PeroncBa') Nysti, Desh., 

 -\- " obligua Sow . , 

 -\-Gastrana latninosa T. Sow., 

 -|- Syn dostnya p rism a tica , 



Antwerp. 



