f\etou.nd /9V/ 



Alkx. Agassiz. 



^ibntru of tijc Piuseum 



OF 



COMPARATIVE ZOOLOGY, 



AT HARVARD COllECE, CAMBRIDGE, MASS. 

 JFouuBEti by pnliatt substiiption, in 18(51. 



Deposited by ALEX. AGASSIZ. 



No. ^^^^^ 



