ILLUSTRATED CATALOGUE 



MUSEUM OF COMPARATIVE ZOOLOGY, 



AT HARVARD COLLEGE. 



No. VII. 



REVISION OF THE ECHINI. 



ALEXANDER AGASSIZ. 



IN FOUR PARTS. 



WITH NINETY-FOUR PLATES AND SIXTY-NINE WOOD-CUTS. 



UNIVERSITY PRESS, CAMBRIDGE, 



WELCH, I3IGELOW, & CO. 



1872-1874. 



