The dentudo abounds every where, and would be extremely palatable, were it not for the thorns with which it is covered. It scarcely ever weighs so much as a pound. I have caught and eaten numbers of them, but have lost many hooks in the process, for they gnawed the line to pieces with their sharp teeth. THE RAYA. The raya is a fish of such singular appearance, that it can hardly be reckoned amongst fishes. Its form resembles that of an oval dish with a flat surface. Its back is black, and its belly white. In the middle of its body is placed a narrow mouth or cheek. It has a smooth, slender, but very long tail, denticulated like a saw, and armed at the end with a poisonous sting, with which, whilst lurking under the sand on the shore, it grievously wounds the naked feet of the sailors walking about there, whenever it has an opportunity. The wound presently swells, gets inflamed, and unless hot ashes be immediately applied to it, causes death. It is a curious fact, that the Abipones use this envenomed sting as a pen-knife to open a vein. The flesh of the raya may be eaten; but it is generally thought that hunger alone could render it palatable, though I must say, that, well fried, it was not unpleasant to my taste. The size and form of these fish vary in various kinds; (for there are many species of them). They appear to be viviparous, for embryos are frequently found in their insides. THE PALOMETA. The palometa is more formidable to swimmers than any crocodile; for its jaws, each of which is furnished with fourteen very sharp, triangular teeth, like so many spears, are its armoury, with which it attacks any part of the human body, and cuts it off at one blow. I myself have seen a strong Abipon with the sole of his foot severely wounded by this fish, and an Abiponian boy with four of his toes cut off by it and hanging only from a bit of skin. To prove the credibility of the fact, I must tell you that the Abiponian women use the jaw of the palometa to shear sheep with. The Abipones also, before they were in possession of iron, used it to cut off the heads of the Spaniards. This fish is found every where in great abundance, but is smaller in the smaller rivers, where it scarce weighs half a pound, while in the larger ones it grows to the size of two or more pounds; but its length never corresponds to its breadth. It has a curved back, thick head, wide mouth, small round eyes, and a broad forked tail. Besides the formidable jaw which I have described, it threatens all assailants with large, long gills, and seven sharp fins, the largest of which is situated in the middle of the back, and runs towards the tail. The body is covered with faint grey spots, interspersed with red, blue, and yellow. The flesh is firm, white, and very savoury; I wish that it were not so full of bones. When the hook is extracted, these fish must be handled with caution, otherwise they will