ELEMENTARY NATURAL HISTORY SERIES 



No. 2 



o 



KEY 



TO THE 



UPPER DEVONIAN 



OF SOUTHERN 



NEW YORK 



•X- X ■* 



Designed for Teachers and Students 

 In Secondary Schools 



o 



BY 



Gilbert Dennison Harris 



Assistant Professor, Paleontology and Stratigraphic Geology, 

 Cornell University; 

 Geologist to the State of Louisiana; 

 Member of the Geological Society of France 



Ithaca: 

 Harris Co. 



