This province is intersected by three rivers which have their sources in the Andes, the San Juan, the Mendoza, and the Tunujan. The two former are named from the cities which are built on their banks. After a course of from 75 to 90 miles, these rivers form the great lakes of Guanasache, which extend above 300 miles from north to south, and their waters are afterwards discharged by the river Tunujan into the south-eastern desert Pampas. These lakes abound with excellent fish of several kinds, and they produce a sufficient quantity of salt to supply the whole province of Cujo. The eastern part of this province, called La Punta, is watered by the rivers Contaro and Quinto, and several smaller streams, and is quite different in its climate and temperature from the western part near the Andes. The plains of La Punta are covered with beautiful trees of large size, and the natural herbage grows to such a height in many places as to conceal the horses and other cattle which roam at large in these extensive plains. Thunder storms are exceedingly violent and frequent, continuing often for many hours, accompanied by incessant and immoderate rain. Among the vegetable productions of Cujo, one of the most remarkable is a species of palm, which never exceeds eighteen feet high, putting forth all its branches so near the ground as to conceal the trunk. The leaves are extraordinarily hard, and terminate in a point as sharp as a sword. The fruit resembles the cocoa-nut, yet only contains a few hard round seeds, with no edible kernel. The trunk of this tree is very large, and is covered by a coarse outer bark of a blackish colour which is easily detached. Below this, there are five or six successive layers of a fibrous bark resembling linen cloth. The first is of a yellowish colour, and of the consistence and appearance of sail-cloth. The others gradually decrease in thickness, and become whiter and finer; so that the innermost is white and fine like cambric, but of a looser texture. The fibres of this natural cloth are strong and flexible, but harsher to the feel than those made from flax. This province produces great abundance of the _opuntia_, a species of the _cactus_, which nourishes the cochineal insect; but the natives are in use to string these insects on a thread by means of a needle, by which they acquire a blackish tint. The fruit of this plant is woolly, about the size of a peach, its internal substance being glutinous and full of small seeds. It is sweet and well-flavoured, and is easily preserved by cutting into slices which are dried in the sun. There are four different trees producing a species of beans; two of which are good eating, the third is employed as provender for horses, and ink is made from the fourth. The most singular vegetable production in this country is called _the flower of the air_, from having no root, and never growing on the ground. Its native situation is on the surface of an arid rock, or twining round the dry