UNITED STATES 



EXPLORING EXPEDITION. 



DURING THE YEARS 



1838, 1839, 1840, 1841, 1842. 



UNDER THE COMMAND OF 



CHARLES WILKES, U. S. K 



MAMMALOGY 



ORNITHOLOGY. 



BY 



JOHN CASSIN, 



MEMBER OF THE ACADEMY OF NATUllAL SCIENCES OF PHILADELrHIA ; OF THE AMERICAN PHILOSOPHICAL SOCIETY: 

 OF THE NATIONAL INSTITUTE; OF THE NATURAL HISTORY SOCIETY OP CHARLESTON; OF THE LYCEUM 

 OF NATURAL HISTORY OF NEW YORK; OF THE NATURAL HISTORY SOCIETY OF MONTREAL; 

 CORRESPONDING MEMBER OF THE ZOOLOGICAL SOCIETY OF LONDON; HONORARY 

 MEMBER OF THE UNITED SOCIETY OF GERMAN ORNITHOLOGISTS, ETC. 



WITH V^OL I ATLAS. 



\ MAR 3 1882,;: 



PHILADELPHIA: 



J. B. L I P P I N C T T & CO. 

 1858. 



