At no great distance from the Igatimy are the heads of two small rivers called (the northern) Iguaray Assu, and (the southern) Iguaray Mirim, which after uniting, join the Chichuhi, a river that discharges itself into the Paraguay, in the latitude of 24° 12′. Neither the treaty of limits agreed upon in 1751 or 1777, mention this river, or any other as the divisionary line; but from the principal origin of the Igurey, the ninth article of the latter treaty, says, that the boundary is to continue in “a direct line, by the highest land, to the principal head of the nearest river which enters the Paraguay;” and the Chichuhi appears to answer best this adjustment. This river is also called Jejuhy, formed, it is said, by the Grande and Pequena Jejuhy, which after their junction receives on the left the Coruguaty. Nearly fifteen miles to the south of the Igatimy, the river Igurey falls into the Paranna, which has formed the limits on that side, between the crowns of Spain and Portugal, since the year 1777. ZOOLOGY.--There are _antas_ of all colours, wolves, white deer, with all other species of quadrupeds known in the other provinces. The middle of the northern part of this province is called, in the journals or diaries of the certanistas, Vaccaria, (or Cattle Plains,) in consequence of the cattle that were here dispersed when the Paulistas expelled the inhabitants of the city Xerez, and of five neighbouring small aldeias, which formed a small province, of which the said city was the head. The remainder of these animals, almost extinct from the devastations of the wild beast and the hunter, were augmented in 1797, by those which the Guaycurus carried off, when they plundered the Spanish plains of the town of Coruguaty; and also by such as escaped from the Coruguatynos, who pursued (to the number of upwards of fifteen hundred) the barbarian pillagers.