PREFACE. 



The object of the present Bulletin is twofold: To call attention 

 to the richness of the United States National Museum in North 

 American land mammals, and to furnish a summary of the systematic 

 results of study in this field to the end of the year 1911.^ North 

 America as here understood is the entire continent from Panama 

 northward, together with Greenland and the Greater and Lesser 

 Antilles. In no other museum is the mammal fauna of so large 

 an area so fully represented. Some idea of the completeness of 

 this representation may be gained from the following tabular synojjsis : 



While preparing this Bulletin I have received much assistance 

 from members of the Biological Survey. My thanks are especially 

 due to Mr. Edward A. Preble, who has examined the entire proof. 



Gerrit S. Miller, Jr. 



September 1, 1912. 



I For the sake of completeness, such forms described during the year 1912 as have come to my notice are 

 Included. 



V 



