ILLUSTRATED CATALOGUE 



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MUSEUM OF COMPARATIYB.Di 



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(I I ' I 



AT HARVARD COLLEGE. 



Published by order of tlie Legislature of Massachusetts. 



No. III. 



MONOGRAPH OF THE NORTH AMERICAN ASTACIDiE. 



DR. HERMANN A. HAGEN. 



CAMBRIDGE: 



FOR SALE BY SEVER AND FRANCIS. 



18 70. 

 s 



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