MEMOIRS 



AMERICAN ACADEMY 



ARTS AND SCIENCES. 



NEW SERIES. 



YOL. YII. 



LIBRARY 



NEW YORK 



BOTANICAU 



OARUEN 



CAMBRIDGE AND BOSTON: 

 WELCH, BIGELOW, AND COMPANY, 



PK1NTER8 TO THE UNIVERSITY. 



18 6 0. 



