East of the source of the Arno, and flows nearly south by Borgo S.
It flows E.N.E as far as Yakutsk (62° N., 127° 40' E.), where it enters the lowlands, after being joined by the Olekma, also from the right.
The Winnipeg, which flows from the territory lying south-east of Lake Winnipeg, is a noble river some 200 m.
At the foot of the hill flows the river See, which at high tide is navigable from the sea.
Some of the principal affluents are the Vinchina and Jachal, or Zanjon, which flow into the Vermejo, the Patos, which flows into the San Juan, and the Mendoza, Tunuyan and Diamante which flow into the Desaguadero, all of these being Andean snow-fed rivers.