UNITED STATES 



EXPLORING EXPEDITION. 



DURING THE YEARS 



1838, 1839, 1840, 1841, 1842. 



UNDER THE COMMAND OF 



CHARLES WILKES, U.8.N. 



C E U STC E A, 



BY 



JAMES D. DANA, A.M., 



MEMBER OF THE SOC. C.KS. NAT. CUR. OF MOSCOW; THE SOC. PHILOMATHIQUE OF PARIS; THB 



GEOLOGICAL SOCIETY OF LONDON; THE AMF.RICAN ACADEMY OF ARTS AND SCIENCES 



AT BOSTON; THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA, ETC. 



WITH A FOLIO ATLAS OF NINETY-SIX PLATES. 



PART I. 



PHILADELPHIA: 

 PRINTED BY C. SHERMAN. 



1852. 



