U. S. NATIONAL MUSEUM 



BULLETIN 100, VOL. 6, PART 4 PL. 74 



£ 



5» o °« o~ 







^5 





^ 



/ \ Ss# O 



-:, •- ^ 



^ 





3S '. 



■^ 



*JL^Sr0t 



si* 



.> 



1<#J9 



*£/<* 



8 



Echinoidea Collected by the "Albatross' 



For explanation of plate see page 310 



