"Like a lawyer," says Professor Owen, "the tongue is the chief organ by which this animal obtains its livelihood in its natural habitat. The warmer latitudes of South America, to which part of the world the Ant-Bear is peculiar, abound in forests and luxuriant vegetation; the insects of the ant and termite tribes that subsist on wood, recent or decaying, equally abound. With one link in the chain of organic independencies is interlocked another; and as the surplus vegetation sustains the surplus insect population, so a peculiar form of mammalian life finds the requisite conditions of existence in the task of restraining the undue multiplication of the wood-consuming insects." The number of male Ant-eaters is supposed to be considerably smaller than that of the females, which circumstance favours the inference that the extinction of the species, like those of the _edentata_ in general, is determined upon.[6] Large as the Ant-Bear is in comparison with the animals on which it naturally feeds, there appear to have been still larger Ant-Bears in the old times of South America. Fossil remains of nearly allied quadrupeds have been detected in both the fresh-water deposits and bone-caves of the post-pliocene period in Buenos Ayres and Brazil. In examining the fossil remains has been found evidence that the nervous matter destined to put in action the muscular part of the tongue was equal to half of that nervous matter which influences the whole muscular system of a man. No other known living animal offers any approximation to the peculiar proportions of the lingual nerves of the fossil animal in question except the Great Ant-eater; but the size of the animal indicated by the fossil was three times that of our Ant-eater. For this strange monster, thus partially restored from the ruins of a former world, Professor Owen proposes the name of _Glossotherium_, which signifies tongue-beast. Evidence of such a creature has been given by Dr. Lund, the Danish naturalist, resident in Brazil: among the fossil remains here (limestone caves of the province Minas) he discovered traces of the Great Ant-eater, which, however, are too imperfect to enable us to determine more accurately its relation to existing species. The fragments indicate an animal the size of an ox! Were the insect prey of these antediluvian Ant-eaters correspondingly gigantic? Two circumstances very remarkable were observed in the Zoological Society's Great Ant-eater: the hinge-like manner in which the animal worked its tail when it had laid itself down, throwing it over the whole of its body and enveloping itself completely; and the peculiar vibratory motion of the long vermiform tongue when protruded from the mouth in search of food. The tongue is not shot forth and retracted, like that of the chameleon, but protruded gradually, _vibrating_ all the time, and in the same condition withdrawn into the mouth.