It is obvious that these big molar teeth, as well as the two smaller ones in front of them on each side of each jaw, are adapted for breaking up rather soft, pulpy food, and not for cutting lumps of bone or raw flesh, as are the molars of the clouded tiger (identical with those of all species of the genus _Felis_), shown in Figs. 21 and 22, pp. 103, 104, nor for rubbing grain, grass or herbage to a paste, as are those of the goat (Fig. 17), those of the Coypu rat (Fig. 19), and those of the elephants and mastodons (Fig. 8).] [Illustration: Plate VII.--Drawings of (1) the upper and (2) the lower series of teeth of the Gibbon (_Hylobates concolor_), one of the anthropoid or most man-like apes (enlarged by one third). If these drawings are compared with those in Pl. VI, showing man's teeth, the most striking difference seen is that the "arch" or series of teeth is here elongated and squared, not rounded in front, whilst there is plenty of room in both jaws for the last or wisdom tooth, which is not the case in modern races of men, though in the ancient Neander man's jaw and in that from Heidelberg there is ample space for the last molar as in the apes. The next most important difference is that in the gibbon the four canine teeth are very large and tusk-like, and must certainly be of value as weapons of attack--which man's are not. Connected with the large size of the canines is the presence of a gap (or "diastema" as it is called) between the four front teeth or incisors of the upper jaw and the upper canine--which allows the lower canine to fit in front of the upper canine when the jaw is closed. The number of the tubercles or cones on the molars (the two smaller pre-molars and the three hinder large molars) can be compared in detail in these beautiful drawings from Professor Selenka's work, which are the most careful and perfect which have ever been published. The agreement of these teeth in man and the gibbon is very close: but there are differences. The first, or most anterior pre-molar of the lower jaw has one predominant cusp or cone; the second, like both in the upper jaw, is "bicuspid," or bi-tuberculate, as in man. The three big molars of the upper jaw are closely similar to those of man, with some small differences, the second being quadri-tuberculate, whilst in man it is as often tri-tuberculate (as it is in Pl. VI) as it is quadri-tuberculate. But the two anterior big molars of the lower jaw are seen to have each five well-marked cones, cusps or tubercles; they are quinqui-tuberculate, whilst in man the first lower molar is often quadri-tuberculate and the second even more frequently so. The last lower molar (wisdom tooth) of the gibbon is like that of man, quadri-tuberculate.