glmoirs of Ifje gluseum of Compurulibc ^oblo^n 



AT HARVARD COLLEGE. 



Vol. XXXIV. No. 2. 



HAWAIIAN AND OTHER PACIFIC ECHINI. 



THE SALENID^, ARBACIADiE, ASPIDODIADEMATIDiE, 



AND DIADEMATIDJE. 



BY 



ALEXANDER AGASSIZ and HUBERT LYMAN CLARK. 



WITH SEVENTEEN PLATES. 



pLAii-s 43-59. 



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



CAMBRIDGE, U. S. A. : 



IPrinteti for tije JHuseum. 



Septejniber, 1908. 



