There is no mistaking a Baboon’s skull; it is large for a Monkey, and the face part is always one-half of the whole, the brain-case being cast in the shade, as it were, by the huge upper and lower jaws, and their fine armament of teeth. In old males the length of face is much greater than one-half, and the front of the upper jaw is stuck out considerably. But in all there is a swelling of the upper jaw-bone, just in front of the orbit and on each side of the nose-bones, which sometimes is vast and at others turned into a ridge. It is this which is covered by the curious tints and colours in some. The jaws seem pinched in, just above the upper grinding teeth, and then comes this swelling. Strong teeth exist in the upper jaw, and the canine, or eye teeth, more than an inch in length, are long, slender, curved, and sharp. The front or incisor teeth are large, the middle ones being the largest, and the three grinders have sharp projections on them which are not readily worn. As the eyes are close together, the orbits are only separated by the forehead (frontal) bone and the united nose-bones (nasals). These cavities are, moreover, broad, and look a little outwards, and they open into the strange swollen muzzle. The ridges over the orbits are great, and the opening for the nose is triangular; the forehead recedes, and is rounded, and the side-bones of the brain-case are bulged out. Underneath, the skull looks very long; the hinder nostril opening is small, and the palate is arched. As the animal eats a variety of food, and fights often, his lower jaw is very strong. It is large and wide behind, and compressed in front. The chin is deep, and so is the side of the jaw close to it, but further back it is less so; and the joint process (condyle) is wide and very flat usually. The lower canines are not as large as the upper, and they fit into a space (diastema) in front of the great canines of the upper jaw. The back teeth are remarkable for their size, the last in the lower jaw having five points, and the others four. The tooth (pre-molar) next to the canine is pushed backwards and sharpened in a curious manner by the action of the great upper canine, which comes down in front of it when the jaw is closed.