"But lo! here are mightier creatures yet. See the vast mylodon, the scelidothere, and the still more colossal megathere! Ponderous giants these. The very forests seem to tremble under their stately stride. Their immense bulk preponderates behind, terminating in a tail of wonderful thickness and solidity. The head is mean, and awakens no terror. The eye lacks lustre, and threatens no violence, though the whole form betokens vast power; and the stout limbs are terminated by the same thick, in-bent, sharp, hoofed claws. One of them approaches that wide-spreading locust-tree. He gazes up at the huge mud-brown structures that resemble hogsheads affixed to the forks of the branches, and he knows that the luscious termites are filling them to overflowing. His lips water at the tempting sight. Have them he must; but how? That heavy stern-post of his was never made for climbing. Yet, see! he rears himself up against the tree. Is he about to essay the scaling? Not he. He knows his powers better. He gives it one embrace--one strong hug, as if to test its thickness and hold upon the earth. Now he is digging away below, scooping out the soft soil from between the roots; and it is marvellous to note how rapidly he lays them bare with those great shovel-like claws of his. Now he rears himself again; straddles wide on his hind-feet, fixing the mighty claws deep in the ground; plants himself firmly on his huge tail, as on the third foot of a tripod, and once more grasps the tree. The enormous hind-quarters, the limbs and the loins, the broad pelvis and thick spinal cord, supplying abundant nervous energy to the swelling muscles inserted in the ridged and keeled bones, all come into play as a _point d'appui_ for the Herculean effort." [Gosse's "Natural History."]