m.'fi 



SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 77 



THE EARLY PALEOZOIC BRYOZOA OF 

 THE BALTIC PROVINCES 



BY 



RAY S. BASSLER 



Ciirator of Paleontology, U. S. National Museum 





i'»eR\ 





WASHINGTON 

 GOVERNMENT PRINTING OFFICE 



1911 



