AM E RICA X SCIENCE SERIES— ADVANCED COURSE 



£44 



z 



GEOLOGY/ 



— " GIFT / 



From the Library of 

 REMINGTON KELLOGG 



BY 



THOMAS C. CHAMBERLIN AND ROLLIN D. SALISBURY 



Heads of the Departments of Geology and Geography, University of Chicago 



Members of the United States Geological Survey 



Editors of the Journal of Geology 



IN THREE VOLUMES 



VOL. II. EARTH HISTORY 



GENESIS— PALEOZOIC 

 SECOND EDITION, REVISED 



Vertebrate Paleontology 

 ft & National Museums 



M 71993 



NEW YORK 

 HENRY HOLT AND COMPANY 



