United States National Museum ^^*fr?*5j 



Bulletin 212 



CHECKLIST 



OF THE MILLIPEDS 



OF NORTH AMERICA 



By RALPH V. CHAMBERLIN 



Department of Zoology 

 University of Utah 

 RICHARD L. HOFFMAN 

 Department of Biology 

 Virginia Polytechnic Institute 



SMITHSONIAN INSTITUTION • WASHINGTON, D. C. • 1958 



