/IDemotrs of the /TOuseum of Comparative Zoology 



AT IIARVAllD COLLEGE. 

 Vol. XLVI. No. L 



HAWAIIAN AND OTHER PACIFIC ECHINI. 



THE CLYPEASTRIDAE, ARACHNOIDIDAE, LAGANIDAE, 

 FIBULARIIDAE, AND SCUTELLIDAE. 



BY 



HUBERT LYMAN CLARK. 



WITH TWENTY-TWO PLATES. 



Plates 122-143. 



[Published by Permission of H. M. Smith, l". S. Fish Commissioner.] 



CAMBRIDGE, U.S.A.: 



I^rinte^ for the /IDuseiini. 



JrNE, 1914. 



