•~ >~ & -r ^ bfa> 



/ >t/f c?y<z-c 



pbrarg of % ^unrnm 



OF 



COMPARATIYE ZOÖLOGY, 



AT HARVARD COLLEGE, CAMBRIDGE, MASS. 

 JFouirtJeTi b$ jmbate suöscrfjjtfott, in 1861. 



üb.-3?M 



