560 



physical revolutions which have acted* at 

 once on great surfaces. 



1.) Part of the basin of the Amazon, run- 

 ning from west to east, between 2° north and 

 12° south, is 880 leagues in length. The 

 western shore of this basin is formed by the 

 chain of the Andes, from the knot of the 

 mountains of Huanuco to that of the sources 

 of the Magdalena. It is enlarged by the coun- 

 terforts of the Rio Beni ~\- 9 rich in ^gem-salt, 

 and composed of several ranges of hills (lat. 

 8° IV south) that advance in the plains on 

 the eastern bank of the Paro. These hills are 

 transformed on our maps into Upper Cordil- 

 leras and Andes of Cuchao %. .Towards the 



* Vol. iv, 336 ; Vol. vi, p. 61, &c. Martins, Phys, der 

 PJianten von Bras., p. 13. 



+ Vol. vl, p. 442. The real name of this great river, respect- 

 ing the course of which geographers have been so long divided, 

 is Uchaparu, probably water (para) of Ucha ; Beni also sig- 

 nifies river, water; for the language of the Maypures has 

 multiplied analogies with that of the Moxos (Vol. v, p. 

 148) 5 and veni (oueni) signifies water in May pure, as una 

 in Moxo. Perhaps the river retained the name of May- 

 pure, when the Indians who spoke that language had emi- 

 grated to the north, towards the banks of the Oroonoko. 



X The Andes of Cuchao, placed in Arrowsmith's map at 

 10i°-12o north of the fabulous lake of Rogagualo, are no- 

 thing more than the mountains of Cuchao, placed by La 

 Cruz, lat. 13°, south-west of that lake. This geographer by 



