Memoirs of the |j[luscum of €omp;uatibc ^oologn 



AT HARVARD COLLEGE. 

 Vol. XXXIV. No. 2. 



HAWAIIAN AND OTHER PACIFIC ECHINI. 



THE SALENID-ffil, ARBACIADJE, ASPIDODIADEMATID^, 

 AND DIADEMATID^. 



BY 



ALEXANDER AGASSIZ and HUBERT LYMAN CLARK. 



"WITH SEVENTEEN PLATES. 



Tlatics -13-59. 



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



CAMBRIDGE, U. S. A. : 



^rinttH for tlje Jluseum, 



Septembek, 1908. 



