SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 

 Bulletin 125 



NORTH AMERICAN LATER TERTIARY 

 AND QUATERNARY BRYOZOA 



BY 



FERDINAND CANU 



Versailles, France 

 AND 



RAY S. BASSLER 



Washington, District of Columbia 





WASHINGTON 



GOVERNMENT PRINTING OFFICE 



1923 



