ILLUSTRATED CATALOGUE 



MUSEUM OF COMPAKATIVE ZOOLOGY, 



AT HARVARD COLLEGE. 



No. vn. 



REVISION OF THE ECHINI. 



ALEXANDER AGASSIZ, 



IN FOUR PARTS. 

 PLATES. 



UNIVERSITY PRESS, CAMBRIDGE, 



WELCH, BIGELOW, & CO. 



1872-1873. 



