Umoirs of t^e Ulusnim of Comparative .^oolo^u 



AT HARVARD COLLEGE. 



Vol. XXXIV. No. 1. 



HAWAIIAN AND OTHER PACIFIC ECHINI. 



THE CIDARID^. 



BY 



ALEXANDER AGASSIZ and HUBERT LYMAN CLARK. 



WITH FORTY-FOUR PLATES. 



[Published by Permission of George M. Bowers, U. S. Commissioner of Fish and Fisheries.] 



CAMBRIDGE, U.S.A.: 



|3rintctr for tlje iluseum, 



Febbcakv, 1907. 



