p. 6—“_The Cordilleras of Cochabamba and the Brazilian mountains approximate to one another by means of separate transverse chains_.” The immense space between the eastern coasts of South America and the eastern declivity of the chain of the Andes is contracted by two mountain masses, which partially separate from one another the three valleys or plains of the Lower Orinoco, the Amazon, and the Rio de la Plata. The more northern mountain mass, called the group of the Parime, is opposite to the Andes of Cundinamarca, which, after extending far towards the east, assume the form of one elevated mountain, between the parallels of 66° and 68° west longitude. It is connected by the narrow mountain ridge of Pacaraima with the granitic hills of French Guiana, as I have clearly indicated in the map of Columbia which I drew up from my own astronomical observations. The Caribs, in their long expeditions from the missions of Carony to the plains of Rio Branco, and even to the Brazilian frontier, are obliged to traverse the crests of Pacaraima and Quimiropaca. The second group of mountains, which separates the valley of the Amazon from that of La Plata, is the Brazilian, which approximates to the promontory of Santa Cruz de la Sierra, in the province of Chiquitos, west of the Parecis hills. As neither the group of the Parime, which gives rise to the cataracts of the Orinoco, nor the Brazilian group, is directly connected with the chain of the Andes, the plains of Venezuela and those of Patagonia are directly connected with one another.[CW] Footnote 15: p. 6—“_Herds of wild dogs_.”