





Z61.2- 







Aiexr^Lgasstz; 







S^brarg 0f % Ijjwscitm 







OF 







COMPARATIYE ZOÖLOGY, 







AT HARVARD COLLEGE, CAMBRIDGE, MASS. 







jFounöetr b» pttbate subscttytfon, fn 1861. 







Depositedby ALEX. AGASSIZ. 













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