429 



the shore N. 22° W., between Caxatambo and 

 Huary, Conchucos and Guamachuco, by Caxa- 

 marca, the Paramo de Yanaguanga and M on- 

 tan, towards the Rio de Guancabamba. It 

 presents (between 9° and 7\°) the three Nevados 

 de Pelagatos, Moyopata, and Huaylillas. This 

 last snowy summit, situated near Guamachuco, 

 (in 7°55' latitude) merits the more particularly to 

 fix at tent ion, si nee from thence on the north, as far 

 as Chimborazo, on a length of 140 leagues, there 

 exists not one mountain that enters the region 

 of perpetual snows. This depression or absence 

 of snows, extends in this interval, over all the 

 lateral chains, while, on the south of the Ne- 

 vado de Huaylillas, we constantly observe that 

 when one chain is very low, the summits of the 

 other surpass the height of 2460 toises. In 

 order to fix attention the more on the branch 

 of the Andes which extends on the west of the 

 Amazon, that of Conchucos and Caxamarca, I 

 shall here repeat that it was on the south of 

 Micuipampa (lat. 7° V) that I found the mag- 

 netic equator. 



The Amazon, or as it is customary to say in 

 those regions, the Upper Maragnon, passes 

 through the western part of the longitudinal 

 valley which lies between the Cordilleras of 

 Chachapayas, and Caxamarca. Comprehend- 

 ing in one point of view, this valley, and that 

 of Rio Jauja, bounded by the Cordilleras of 



