PLATE 7 



Profile along divide separating deserl and Pacific drainages, in south- 

 ern California, from the high southern Sierras to the Mexican line, 

 showing life zones. This profile is of course not in a straight line between 

 the terminal points. Care has been taken to represent the life zones in 

 their proper relative extents with due regard to total distance, as well 

 as to altitude. 'The diametrical dimension thus shown may be taken as 



an index in each ease to the area involved. This statement has 1 q 



verified by comparison with an ordinary /one map of the region. 



[400] 



