NA-f 



50 50 



'd 



Uf.S 



ibraru of th Musnim 



^ Q 



COMPARATIYE ZOOLOGY, 



AT HARVARD COLLEGE, CAMBRIDGE, MASS. 

 iFounUeti bj ptibate suhsctfptfon, in 1861. 



Deposited by ALEX. AGASSIZ. 



No. I3j, Q // 



