PLATE 7 



Profile along divide separating desert 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 case to the area involved. This statement has been 

 verified by comparison with an ordinary zone map of the region. 



[400] 



