6 Bulletin 15 316 



SeHion at Grand Gulf; Flora and fauna of Grand 



Gulf beds 76 



Louisiana: 



The Vicksburg limestone 76 



Grand Gulf sandstones and clays; Flora and fauna of 



the Grand Gulf; Unionidce from Grand Gulf series 77 



The Frio clays 79 



Texas: 



The Grand Gulf sandstones 79 



Flora and fauna of Grand Gulf beds; The Frio clays; 

 Fossiliferous bed in Frio clays near Burkville; Cor- 

 relation of the Oligocene beds in the Southehi States 80 

 Correlation Table of the Oligocene in the 



Southern States 81 



PART III. 



Comparison and Correlation of the Oligocene 

 OF THE Southern States with That of Western 



Europe 8 2-90 



Resemblances of the European Oligocene Fauna to 



That of the Southern States 82-88 



Foraminifera ; Echinodermata; Comparisoyi of mollus- 



ca7i species 82 



Oligocejie species 83 



European Oligocene species in America?! Eocene and 



Miocene beds 85-88 



Eocene, 85; Miocene, 88. 

 Correlations of European Oligocene Beds with Those 



of the Southern States: Conrad' s correlation 88 



Heilprin' s correlation; DaWs correlation; S2immary 



arid co7'7'elation • 8g 



Comparative Stratigraphic Table of the Oli- 

 gocene OF Western Europe and the Southern 



United States, opp. p 90 



Plates and Explanations 92-04 



