UNITED STATES NATIONAL MUSEUM BULLETIN 264 



Catalog of 

 Recent Echinoid Type Specimens 



in the 



U.S. National Museum 



Smithsonian Institution 



and the 



Museum of Comparative Zoology 



Harvard University 



MAUREEN E. DOWNEY 

 Smithsonian Institution 



SMITHSONIAN INSTITUTION PRESS 

 WASHINGTON, D.C. 



1968 



