? ? ? ? Man's survival does not hinge so greatly upon the perfection of his senses. His power to reason has relieved them of many of their duties, and so they have, to some extent, atrophied, as have the muscles which move the ears and scalp, merely from disuse.
? ? ? ? The muscles are there, about the ears and beneath the scalp, and so are the nerves which transmit sensations to the brain, but they are under-developed because they are not needed.
? ? ? ? Not so with Tarzan of the Apes. From early infancy his survival had depended upon acuteness of eyesight, hearing, smell, touch, and taste far more than upon the more slowly developed organ of reason.
? ? ? ? The least developed of all in Tarzan was the sense of taste, for he could eat luscious fruits, or raw flesh, long buried with almost equal appreciation; but in that he differed but slightly from more civilized epicures.
? ? ? ? Almost silently the ape-man sped on in the track of Terkoz and his prey, but the sound of his approach reached the ears of the fleeing beast and spurred it on to greater speed.
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