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 gether, and two of these having been left behind have appeared soon after supporting and carrying on their back a small dead dolphin that was on the point of sinking, as if in pity for it, that it might not be devoured by any other creature. Incredible things are told of the swiftness of the dolphin, which appears to be the swiftest of all animals whether marine or terrestrial. They even leap over the masts of large ships. This is especially the case when they pursue a fish for the sake of food; for if it flies from them they will pursue it, from hunger, into the depths of the sea. And when they have to return from a great depth, they hold in their breath, as if calculating the distance, and gathering themselves up they shoot forward like an arrow, wishing with all speed to accomplish the distance to their breathing-place. And if a ship happen to be in the way, they will leap over its masts. The males and females live in pairs with each other. There is some doubt why they cast themselves on shore, for it is said that they do this at times without any apparent reason.”

The freshness of spirit which breathes through this passage characterises the whole of Aristotle’s treatise, which, in spite of its sometimes reminding us of the “showman” of modern times, has excited the enthusiastic admiration of several great authorities. Cuvier says, “I cannot read this work without being ravished with astonishment. Indeed it is impossible to conceive how a single man was able to collect and compare the multitude of particular facts implied in the numerous rules and aphorisms which are contained