"The Duck-billed Platypus of South Australia has the body of a mole, the tail of a raccoon, the flat bill of a duck, and the flipper of a seal, combined with the feet of a rat. It lays eggs as birds do, but suckles its young as do other mammalia. The Opossum has a prehensile tail, as have some monkeys, and in addition a living bag or pouch in which the female carries her tiny young. The young of a kind of tree frog of the genus Hylodes, breathe through a special organ in their tails; the young of the Pipa, a great South American toad, burrow into the skin of the mother, and still another from Chili, as soon as hatched, creep down the throat of the father frog, and find below the jaw an opening into a false membrane covering the entire abdomen, in which they repose in safety. Three species of frogs and toads have no tongue at all, while in all the others the tongue is attached by its tip to the end of the mouth, and is free behind. The ordinary Bullfrog has conspicuous great legs, while a relative, the Coecilia (and others as well) have a head reminding of the frog, but neither tail nor legs, the body being elongated as if it were a worm. The long, slender fingers of a Bat are united by means of a membrane that enables it to fly like a bird, while as a contrast, the fingers of a Mole, its near cousin, are short and stubby, and massive as compared with its frame. The former flies through the air, the latter burrows (almost flies) through the earth. The Great Ant-eater has a curved head which is drawn out into a slender snout, no teeth, a long, slender tongue, a great bushy tail, and claws that neither allow the creature to burrow in the earth nor climb into trees, but which are admirably adapted to tear an ant-hill into fragments. Its close relatives, the Apar and Armadillo, have a round body covered with bony plates, and a short, horny, curved tail, while another relative, the Long-tailed Pangolin, has a great alligator-like tail which, together with its body, is covered with horny, overlapping scales. "The Greenland Whale has an enormous head occupying more than one-third its length, no teeth, and a throat scarcely larger than that of a sucker fish. The Golden Mole has a body so nearly symmetrical that, were it not for the snout, it would be difficult to determine the location of the head without close inspection, and it has legs so short that, were it not for the powerful claws, they would not be observed at all. The Narwhal has a straight, twisted tusk, a--" "Hold, hold," I interrupted; "do you think that I am concerned in these well known contrasts in animal structure?" "Did you not question the possibility of the description I gave of my grotesque drunkards, and of the form of my subterranean guide?" my guest retorted. "Yes; but I spoke of men, you describe animals."