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DEPOSITED IN 
THE LIBRARY OF 
THE BIOLOGICAL LABORATORIES 
LEZIOIVI 
DI 
BOTINICI COfflPlRlTl 
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l^ibrarg ai P^Rsntm 
OF 
COMPARATIVE ZOÒLOGY, 
AT HAEVAKD COLLEGE, CAJIBR18GE, MASS, 
jj'ountie'ìi i)2 pribate suhscrfptfon, fn 1861 . 
Deposited by Louis Agassiz. 
No. ^iS^jS, 
