SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 166 



THE OXYSTOMATOUS AND ALLIED 

 CRABS OF AMERICA 



BY 



MARY J. RATHBUN 



Associate in Zoology, United States National Museum 



^^^^^£^^^ 







UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON : 1937 



For sale by the Superintendent of Documents, Washington, D. C. ---------- Price 60 cents 



