EXPLOEATIONS AND SURVEYS FOE A EAILEOAD EOUTB PEOM THE MISSISSIPPI EIVEE TO THE PACIFIC OCEAN. 



WAR DEPAETMENT. 



BIRDS: 



BY SPENCER F. BAIRD. 



ASSISTANT SECRETARY SMITHSONIAN INSTITUTION. 

 ■VTITH THE CO-OPERATION OP 



JOHN CASSIN AND GEOKGE N. LAWKENCE. 



WASHINGTON, D. C. 

 1858, 



b2* 



