C 1 i t 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 140, NUMBER 5 



(End of Volume) 



Cfjarles; B. anb jWarp "^aux JKHalcott 

 i^esiearcf) jFunb 



A REVISION OF THE ORDOVICIAN 



BRYOZOAN GENERA BATOSTOMA, 



ANAPHRAGMA, AND AMPLEXOPORA 



(With Seven Plates) 



By 

 RICHARD S. BOARDMAN 



Associate Curator of Geology 



United States National Museum 



Smithsonian Institution 



(Publication 4426) 



QTY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER IS, 1960 



