SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 97. NUMBER 10 



FOURTH CONTRIBUTION 



TO NOMENCLATURE OF CAMBRIAN 



FOSSILS 



BY 



CHARLES ELMER RESSER 



Curator, Division of Invertebrate Paleontology, 



U. S. National Museum 



(Publication 3487) 



QTY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



DECEMBER 17. 193 8 



