The smallest and last in order of the anthropoid apes is the gibbon. He is much smaller in size, greater in variety, and more active than any other of the group. His habitat is in the southeast of Asia; its outline is vaguely defined, but it includes the Malay Peninsula and many of the contiguous islands east and south of it. In model and texture the skeleton of the gibbon is the most delicate and graceful of all the apes, and in this respect is superior to that of man. He is the only one of the four apes that can walk in an erect position. In doing this the gibbon is awkward and often uses his arms to balance himself. Sometimes he touches his hands to the ground. At other times he raises them above his head or extends them on either side. The length of them is such that he can touch the fingers to the ground while the body is nearly or quite erect. In the spinal column he has two, and sometimes three, sections more than man. His digits are very much longer, but his legs are nearly the same length, in proportion to his body, as those of man. He has fourteen pairs of ribs. The gibbon is the most active and probably the most intelligent of all apes. He is more arboreal in habit than any other. Many stories are told of his agility in climbing, and leaping from limb to limb. One authentic report credits one of these apes with leaping a distance of forty-two feet, from the limb of one tree to that of another. Perhaps a better term is to call it swinging, rather than leaping, as these flights are performed chiefly by the arms. Another account is that a gibbon swinging by one hand propelled himself a horizontal distance of eighteen feet through the air, seized a bird in flight, and alighted safely upon another limb, with his prey in hand. There are several known species of this ape. The largest of these is about three feet high; but the usual height is not more than thirty inches. The voice of one species is remarkable for its strength, scope, and quality, being in these regards superior to that of all other apes. Most of the members of this genus are endowed with better vocal qualities than other animals. This ends the list of the manlike apes. Next in order after them come the monkeys, then the baboons, and, last, the lemurs.