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Rh the thigh bones are set so wide apart that the knees cannot be made to approach each other. The palms or soles of the feet are set on obliquely, facing inward, as we saw in the Apes, and for the same purpose. ‘The bones of the feet are exceed- ingly rigid, being, to a considerable extent, sol- dered, as it were, together&#59; and the toes are ter- minated by powerful hooked claws of enormous length, which in a condition of rest are drawn down upon the palm and wrist, and can be ex- tended only by the will and muscular effort of the animal. It is easy to see how these characters are suited to a hanging and climbing habit: the sharp bent claws forming effective hooks for holding on, the immovable limbs for maintaining a firm hold, the oblique articulation of the feet and thighs for embracing a branch, and the great length of the arms for seizing a fresh hold, or for drawing the twigs and leaves to the mouth. In other respects, also, the same Divine care is manifest. Though the structure of the molar teeth will not admit of the food being much ground in the mouth, and the intestinal canal is unusually short for vegetable feeders,—yet this is compensated by the volume and complexity of the stomach, which is divided into four compartments, scarcely less elaborate than those of the Ruminantia. The body is clothed with long, coarse hair, somewhat resembling dried grass, or the tree-moss (Tillandsia) which hangs in immense bunches from the tropical forests. The face is short and round, like that of a Monkey. There are but three toes on the hind-feet, and either two or three, (according to the genus,) on the fore ones: the toes are enveloped in the skin.

The two genera which comprise this Family,