484 



round them, on the east, towards the Rio Palo- 

 mino; on the south, towards the villages of Va- 

 lencia de Jesus and Santa Maria Ansola, towards 

 the sources of the Rio Cesar, and towards the 

 Valle de XJpar, anciently known by the name of 

 the Villa de Reyes ; and on the west, towards 

 the Aracataca * . Low ridges and a succession 

 of hills indicate perhaps an ancient connection of 

 the Sierra Nevada of Santa Marta on one side, by 

 the Alto de las Minos ^ (on the west of Laguna 

 Zapatosa) with the phonolitic and granitic rocks 

 of Penon and BancaJ, and on the other, by the 

 Sierra de Peri j a with the mountains of Chiligu- 

 ana and Ocafia, which are the counter-forts § of 

 the eastern chain of the Andes of New Grenada. 

 In this latter chain the febrifuge species of 

 quinquina (corollis hirsutis, staminibus inclusis) 

 which advance most to the N. E., are those of 

 the Sierra Nevada de Merida || • but the real 

 Cinchona, the most northern of South America, 

 is found in the temperate region of the Sierra 

 Nevada of Santa Marta. 



* MSS. of General Cortes. 



+ It is a prolongation of the Sierra Nevada towards the 

 S. W. 



{ On the banks of the Rio Magdalena, a little to the 

 northward of Tamalameque and Regidor/ of which I found 

 the lat. 8° 30', and the long. 76° 13'. 



§ Vol. vi, p. 453. 



|| Vol. vi, p, 210, 



