PREFACE. 



The object of the present Biilletm 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 synopsis : 



Family. 



Didelphiidae 



Solenodontidae 



Talpidae 



Soricidae 



E mballonuridaj 



Noctilionidae 



Phyllostomidse 



DesmodidEB 



Natalidaj 



Thyropteridse 



Vespertilionidfe 



MolossidfE 



Ursidae 



Canidse 



Procyonidae 



Mustelidse 



FeUdffi 



Otariidae 



Phoeidae 



Odobenidse 



Muridae 



(Cricetinae) 



(Neotominac) . . 



(Microtinae) 



(Murinse) 



Geomyidae 



Heteromyidae 



Num- 

 ber 

 of 

 forms 

 not 

 repre- 

 sent- 

 ed. 



Eu- 



types. 



54 

 (37) 



(3) 

 (13) 



327 

 (175) 

 (57) 

 (95) 



81 

 116 



Hy- 

 po- 

 types. 



32 



(20) 



(7) 



(5) 



Family. 



Zapodidaj 



Octodontidae 



Dasyproctidse 



Erethizontidae... 



Aplodontiidae 



Sciuridae 



Petauristidae 



Castoridse 



Ochotonidae 



Leporidas 



Bradypodidae 



MyrmecophagidEe 



Dasypodidae 



Saimiridse 



Aotidae 



Callitrichidse 



Alouattidae 



Cebidae 



Atelidae 



Tayassuidse 



Cervidae 



Antllocapridae 



Bovidse 



Tapiridae 



Total 



Num- 

 ber 

 of 

 forms 

 recog- 

 nized. 



Num- 

 ber 



of 

 forms 



in 

 collec- 

 tion. 



2, 1.38 



IS 



14 



6 



8 



6 



244 



18 



6 



10 



96 



3 



4 



3 



1 



1,9.55 



Num- 

 ber 

 of 

 forms 

 not 

 repre- 

 sent- 

 ed. 



Eu- 

 types. 



1,075 



Hy- 

 po- 

 types. 



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. 



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

 included. 



