CH. II] 



DIAGRAM OF RANGE OF LEMURS. 



123 



The range of any particular form is given by leaving 

 out all but the sub-regions where it occurs, putting these 

 in their proper place. Thus the range of the existing 

 Lemurs would be expressed in the following way. 



1 3 

 13 2 4 



4 1 



It might be advantageous to mark in heavy type those 

 sub-regions which are especially inhabited by the animal 

 in question, and various other modifications are of course 

 possible and will suggest themselves. The great advan- 

 tage of Mr Mitchell's scheme is that it can be so easily 

 used for the purposes of blackboard demonstration in 

 lectures. 



