o'ij.% 



^(iirww/ /^3ä^ 



Jibrarg of tl^t Hits^um 



OF 



COMPARATIYE ZOÖLOGY, 



AT HARVARD COLLEGE, CAMBRIDGE, MASS. 



jFountieti bs prtbatc subscriptfon, fn 1861. 



Deposited by ALEX. AGASSIZ. 



No. y 3 s^3 



