X.] 



ITS FAUNA. 



369 



The following list includes such exclusively New World genera 

 of mammals (apart from bats) which are represented in the 

 Sonoran area; those which may be regarded as more or less 

 nearly confined to this region being printed in italics. To appre- 

 ciate fully the significance of this list, reference must, however, be 

 made to the series of Holarctic genera given on p. 360, which 



FIG. 76. HEAD OF MALE PRONGBUCK (Antilocapra americana). 



are more or less completely restricted to the Canadian sub-region 

 of that great region, and the intervening Transition zone. The 

 Sonoran list is as follows, viz. : 



Insectivora. 



SORICID^E. 



Notiosorex. Also Central America. 

 Blarina. Enters Canadian sub-region of Holarctic. 

 L. 24 



