14 



AMAZONIA AND LA PLATA. 



The Potaro and the Kaieteur Falls. 

 Lower down tlie Essequibo is joined by the Burroburro and Potaro rivers, both 

 flowino- from the foothills of the Pacaraima uplands, and in their descent tumbling 

 over numerous cascades and rapids. The Kaieteur Falls, formed by the waters of 



Fig. 5. — EssEauiBO and Upper Eio Beanco Basins. 

 Scale 1 : 7.000,000. 



Depths 



Bapids or 

 Cataracts. 



to 5 6 to 25 25 Fathoms 



Fathoms. Fathoms. aud upwards. 



125 Miles 



the Potaro about the middle of its course, are amongst the finest in Guiana and 

 even in the whole world. Yet their very existence was absolutely unknown to 

 Europeans till the year 1871, when they were discovered by Mr, C. Barrington 

 Brown, at that time engaged on a geological survey of the British Colony. Here 



