16 



THE GEOGRAPHY OF MAMMALS 



Table I. 



Approximate Numbers of Families, Genera, and Species of 

 Mammals in the six Regions. 



Table II. 



Numbers given in Table I. reduced to Percentages of Total 

 Numbers of Families and Genera. 



The groups entirely confined to each region are classed as " endemic " ; 

 those that cross the frontiers slightly as " quasi-endemic " ; all others are 

 considered as "wide-spread." 



The percentages, it will be observed, on account of the omission of 

 fractions, do not exactly make up one hundred in every case. 



