So in shape, in limbs, and in claws, the tiger, the lion, and their relations, are the perfection of hunting animals; and when we examine the well-formed head set upon the strong neck, so that it can turn widely from side to side, ever on the watch, we see that here too everything is fitted for the work. Not only are his ears so quick of hearing that the smallest rustle in the grass startles him at once, while his large round eyes have a special reflecting mirror at the back to catch the faint rays of evening light when he prowls abroad, but the whisker-like tufts on his face are so provided with nerves at their base that when he raises them they are the most delicate feelers to guide him in the dark. Then, instead of the long narrow face, flat teeth, and sideways-moving under jaw of the horse or ox, we find that he has a large broad brain-case with a well-formed brain within, and a short face with rough bony ridges upon it, to support powerful muscles which move the lower jaw _up and down_, so as to mince the food, and even crush solid bones. Such a small mouth cannot hold many teeth, and the front ones, though sharp and pointed, are small, for the tiger does not fight with his teeth like the wolf, but strikes with his heavy paw. But the eye-teeth are immensely large, strong, and dagger-like, to hold the prey and tear the flesh apart, and all the double teeth behind, especially the last bottom tooth and the one to match it above, have very sharp cutting edges, so that, when the two jaws work against each other they divide the flesh like a pair of shears. Lastly, his tongue is not soft and fleshy, so as to serve for tasting, but very rough, and covered with horny pimples which serve to rasp the flesh from the bones of his prey. Thus, in all the animals of the cat tribe, such as the lion, the tiger, the jaguar, and their relations, every part of the body has become fitted to help them in the work of destruction; and even their near relation the Hyæna, though he cannot keep his claws sharp by drawing them in, nor leap so well because his hind legs are short, makes up for this by his immensely strong jaw and conical teeth with which he attacks his prey, instead of using his paw, and which serve him to split open even the strongest thigh bone of a horse or ox, or to gnaw the ends to extract the marrow.