On Beating The Bushes, A Shoal Of Toninas (Fresh-Water Dolphins) Four Feet Long, Surrounded Our Boat.

These animals had concealed themselves beneath the branches of a fromager, or Bombax ceiba.

They fled across the forest, throwing out those spouts of compressed air and water which have given them in every language the name of blowers. How singular was this spectacle in an inland spot, three or four hundred leagues from the mouths of the Orinoco and the Amazon! I am aware that the pleuronectes (dabs) of the Atlantic go up the Loire as far as Orleans; but I am, nevertheless, of opinion that the dolphins of the Temi, like those of the Ganges, and like the skate (raia) of the Orinoco, are of a species essentially different from the dolphins and skates of the ocean. In the immense rivers of South America, and the great lakes of North America, nature seems to repeat several pelagic forms. The Nile has no porpoises:* those of the sea go up the Delta no farther than Biana and Metonbis towards Selamoun. (* Those dolphins that enter the mouth of the Nile, did not escape the observation of the ancients. In a bust in syenite, preserved in the museum at Paris, the sculptor has represented them half concealed in the undulatory beard of the god of the river.)

At five in the evening we regained with some difficulty the bed of the river. Our canoe remained fast for some minutes between two trunks of trees; and it was no sooner disengaged than we reached a spot where several paths, or small channels, crossed each other, so that the pilot was puzzled to distinguish the most open path. We navigated through a forest so thick that we could guide ourselves neither by the sun nor by the stars. We were again struck during this day by the want of arborescent ferns in that country; they diminish visibly from the sixth degree of north latitude, while the palm-trees augment prodigiously towards the equator. Fern-trees belong to a climate less hot, and a soil but little mountainous. It is only where there are mountains that these majestic plants descend towards the plains; they seem to avoid perfectly flat grounds, as those through which run the Cassiquiare, the Temi, Inirida, and the Rio Negro. We passed in the night near a rock, called the Piedra de Astor by the missionaries. The ground from the mouth of the Guaviare constantly displays the same geological formation. It is a vast granitic plain, in which from league to league the rock pierces the soil, and forms, not hillocks, but small masses, that resemble pillars or ruined buildings.

On the 1st of May the Indians chose to depart long before sunrise. We were stirring before them, however, because I waited (though vainly) for a star ready to pass the meridian. In those humid regions covered with forests, the nights became more obscure in proportion as we drew nearer to the Rio Negro and the interior of Brazil.

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