SMITHSONIAN INSTITUTION 



UNITED STATES NATIONAL MUSEUM 



Bulletin 152 



THE CANCROID CRABS OF AMERICA 



OF THE FAMILIES EURYALIDAE, PORTUNIDAE, 



ATELECYCLIDAE, CANCRIDAE 



AND XANTHIDAE 



BY 



MARY J. RATHBUN 



Associate in Zoology, United States National Museum 







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UNITED STATES 



GOVERNMENT PRINTING OFFICE 



WASHINGTON : 1930 



For sale by the Superintendent of Documents, Washington, D. C. 



Price 32.00 (paper cover) 



