i^ibrarg of t\jt ®usßum 
OF 
r 
<fL 
COMPARATIVE ZOÖLOGY, 
AT UARVARl) COUEOE, CAUBRIDGE, MASS. 
U'ountieti Ö5 pribnte siibscrfptfon, in 1861 . 
Deposited by ALEX. AGASSIZ. 
N0.//900 
I .y l/ O Y. / f 
DEPOSITED 
IN THE 
BIOLOGICAL LABORATORY 
