CHAP. XV.] THE NEARCTIC REGION. 139 



TABLES OF DISTKIBUTIOK 



In drawing np these tables, showing the distribution of 

 various classes of animals in the ISTearctic region, the following 

 sources of information have been chiefly relied on, in addition to 

 the general treatises, monographs, and catalogues used in the com- 

 pilation of the 4th Part of this work. 



Mammalia. — Professor Baird's Catalogue ; Allen's List of the 

 Bats ; Mr. Lord's List for British Columbia ; Brown, for Green- 

 land ; Packard for Labrador, 



Birds. — Baird, Cassin, and Allen's Lists for United States; 

 Ptichardson's Fauna Boreali Americana; Jones, for Bermudas; 

 and papers by Brown, Cones, Lord, Packard, Dall, and Professor 

 Newton. 



