UNITED STATES 



EXPLORING EXPEDITION 



G^W DURING THE YEARS 



p 5 ^5 1838, 



NH 



1838, 1839, 1840, 1811, 1842. 



UNDER THE COMMAND OF 



CHARLES WILKES, U.S.N, 

 YOL. XV. 



THE 



GEOGRAPHICAL DISTRIBUTION 



OF 



ANIMALS AND PLANTS, 



BY 



CHARLES PICKERING, M.D., 



MEMBER OF THE SCIENTIFIC CORPS ATTACHED TO THE EXPEDITION. 



BOSTON: 

 GOULD AND LINCOLN, 



50 WASHINGTON STREET. 

 LONDON: TKUBNER AND COMPANY. 



1863. 



