EIYEES OF AEGENTINA. 



375 



of the delta on both rivers develops a total length of 38 miles in a bee line, and 

 in 1860 was intersected by eleven branches. But the number of these fluvial 



Yig. 151. — Parana-Ueuguay Delta. 

 Scale 1 : 3,500,000. 



60' West oF ureenwicK 



Zone of Inundation. 



75 Miles. 



mouths varies with the discharge and with the progress of the delta down the 

 estuary. 



Both in the Parana and the Uruguay the tides ascend to a distance of over 

 90 miles. But at low water the two rivers present a great contrast, for the Parana 

 still remains a great and majestic stream, with a volume even at its lowest level 



