THE CLOSED BASINS OF AEGENTINA. 



37'J 



lateral branch to Luke Bebedero. This basin, former recipient of a large northern 

 affluent from Aconcagua, expands and shrinks with the seasons, at times a mere 

 saline pool, at times overflowing far and wide into the surrounding banados. In 

 drj' years the Bebedero deposits layers of salt around its margin, and it appears 



Fis;-. 153. — Rios Bebedero and Canada. 

 Scale 1 : 700,000. 



from other indications to be in process of desiccation. It will doubtless be 

 ultimately transformed to a saline depression, like those situated farther north 

 along the course of the canada or channel of its former affluent from Aconcagua. 



Beyond the Bebedero, that is, the "Drinker," in reference to the water- 

 courses absorbed in its basin, a branch of the Desaguadero^ swollen by the Rio 



