THE MIDWAY STAGE. 



BY 



Gilbert D. Harris. 



SUMMARY OF CONTENTS. 



Page. 



Preliminary Considerations 4-6- 



Divisions of the Bocene. 4- 



Aim and scope of this work.... 5- 



Collection of fossils, field notes, etc., on 

 which this work is based: The Cornell Uni- 

 versity collection and the collectors' Jiotes; Dr. J. M. 

 Safford's collection of types; T H. Aldrich' s fossils 

 a7id figures; Collection of the U. S. National Mu- 

 seum; The author's publications and notes 07i this 

 stage in Arkansas a7id Texas 5"6. 



PART I. GBOI^OGY 744 



Brief Historical Sketch of the Study of 

 THE Midway Stage ..•• •••••• ^-lo. 



Period of 1834-1859: Featherstonhaugh, A. 

 Winchell, Harper — • • •- 7 • 



Period of 1860-1883: Gabb,.Safford, Hilgard, 

 Loughridge, White ^ • 



Period of 1884-1896: fohnson, Smith, Penrose, 



La7igdon, Spencer, Safford, Harris, Aldrich 8. 



Stratigraphic Nomenclature 10-13. 



Synonymy ^°- 



"Usage of the term Midway: Priority ;^ Lo- 

 cation, geographically and geologically; Differentiation 

 from the Lignitic; The Midway stage, a stratigraphic 



and paleo7itologic unit • • • • • ^ ^ • 



Geology of the Midway Stage in Different 

 States ••• i3-37- 



Texas: Rio Grafide section, Colorado river section, 

 Brazos river section. Falls county. Limestone county, 

 Katcfman county ■• 1 3" ^ 5 • 



