comparative anatomy, and above all, of social psychology.
3. The Features. Whatever the cause of our concealment of the body, it has led to an emphasis on the anatomical details of the face which could not be found in more primitive times. Leaving out of consideration the general shape of the face and head, which are probably important mainly as racial signs, we may consider briefly the chin, the nose, the eyes and the ears.
That there is a preference on the part of both sexes, and in the consideration of both sexes, for a well-developed chin, is a matter of common knowledge. The reason for this preference is less evident, and in fact I can here indicate only a strong probability. Racial factors are involved, of course, but there seems to be a more general foundation which is vaguely involved in the commonplace statement, that the possession of a chin is one of the conspicuous points which differentiate man from the beasts. This is obviously true; the vital question is: What are the direct consequences of this structural peculiarity? This question can be answered by reference to comparative anatomy and to the psychology of the thought processes. The projecting chin gives room in the mouth cavity for the human tongue, which is strikingly different from the brute tongue. The tongue of the lower animal is a long thin strip of
