

SMITHSONIAN INSTITUTION 

 IX/^/^UNITED STATES NATIONAL MUSEUM 



Bulletin 56 



MAMMALS OF THE MEXICAN BOUNDARY 

 OF THE UNITED STATES 



A DESCRIPTIVE CATALOGUE OF THE SPECIES OF MAM- 

 MALS OCCURRING IN THAT REGION; WITH A 

 GENERAL SUMMARY OF THE NATURAL 



HISTORY, AND A LIST OF TREES 



/ 



/ 



BY 



EDGAR ALEXANDER MEARNS, M. D. 



Major and Surgeon , U. S. Army 



PART I 



Families Dideiphiids to Muridae 



WASHINGTON 



GOVERNMENT PRINTING OFFICE 



