EXPLORATIONS AND SUBVETS FOR A RAILROAD ROUTE FROM THE MISSISSIPPI RIVER TO THE PACIFIC OCEAN. 



WAR DEPARTMENT. 



BIRDS: 



BY SPENCER F. BAIRD. 



ASSISTANT SECRETARY SMITHSONIAN INSTITUTION. 

 WITH THE CO-OPEEATION OF 



JOHN CASSIN AND GEORGE N. LAWRENCE. 



WASHINGTON, D. 0. 



1858. 



b2* 



