A MANUAL 



OF THE 



VERTEBRATE ANIMALS 



OF THE 



NORTHERN UNITED STATES 



INCLUDING THE DISTRICT NORTH AND EAST OP THE 



OZARK MOUNTAINS, SOUTH OP THE LAURENTIAN 



HILLS, NORTH OP THE SOUTHERN BOUNDARY 



OP VIRGINIA, AND EAST OP THE 



MISSOURI RIVER 



INCLUSIVE OF MARINE SPECIES 



BY 

 DAVID STARR JORDAN 



PRESIDENT OF LELAND STANFORD JUNIOR UNIVERSITY 



TWELFTH EDITION 

 NEWLY REVISED AND ENLARGED 



CHICAGO 



A. C. McCLURG AND COMPANY 



1916 



