Compare the hinder grasping (so-called) hand of the Gorilla with this. At first sight there is a great difference, for the great toe and its metatarsal bone form _an angle_ with the bones of the other toes and their metatarsals. Instead of the toes and their slender bones being parallel and fixed in this position, the great toe of the Gorilla has a power of moving so as to cross the foot more or less below, as the human thumb can cross the palm. It has also the capacity of being stretched out from the foot, so that its movements greatly resemble those of a thumb. In fact, we want a word to express a toe-thumb. On examining the foot carefully, it will be found that each of its bones may be compared and identified in position and office with the same in man. There is a heel-bone with a great projection behind, for the fixing on of the Achilles tendon, and this is jointed on to a bone above, like the human die-bone or astragalus, and to one in front, like the cuboid. The astragalus resembles that of man, but the upper and outer surfaces on which the lower ends of the leg-bones move, are slightly different, so as to admit of greater turning in of the ankle. The wedge-shaped bones are there, and the inner one, with its joint for the slender bone of the great toe, is shorter and broader than in man, so as to allow of great movement of the toe-thumb in front of it. The slender bones, or metatarsals, are larger and longer, but their shape and direction, with the exception of the first, are singularly like those of man. As a whole the foot of the Gorilla, for thus it must be called, is broader in front of the ankle-bones and longer everywhere than in us, but it has a sideway and almost club-foot look about it; its position is “turned in,” like the foot of a young child before it walks. This is owing to the conformation and easy jointing of the bones of the ankle and foot, and also to the action of a front muscle of the leg which pulls the very movable bones inwards. The structures allow of a very ready turning in of the ankle and foot, and such as would render climbing easy with the aid of the toe-thumb; but they evidently interfere with the steadiness in walking. It is a huge foot, and it is only half an inch or so shorter than the leg below the knee; it is unwieldy as a foot, but is a capital foot-hand, which cannot readily have its toes stretched out straight, for their usual position is that of being slightly bent in the direction of the sole.