SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 75 



NORTH PACIFIC OPHIURANS IN THE COLLEC- 

 TION OF THE UNITED STATES 

 NATIONAL MUSEUM 



BY 



HUBERT LYMAN jCLARK 



Museum of Comparative Zoology, Cambridge, Mass. 





WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1911 



