Opossums are of various kinds and sizes. They inhabit the hollows of trees, or sometimes the tops, where they make a house for themselves with boughs. They are also found in the holes of rocks. They are hunted both in the day-time and by moon-light. During the day the native, as he passes along, examines minutely the bark of the trees, to see whether any marks have been left by the claws of the animal in climbing on the previous night. If he finds any he is sure that an opossum is concealed, either in that tree or one adjoining. The way he distinguishes whether the marks are recently made or otherwise is, by examining the appearance of the bark where the wound is, if fresh it is white, has rough edges, or has grains of sand adhering to it; if otherwise it is dry and brown, and free from loose particles. Having ascertained that an opossum has recently been there, he then ascends the tree to look for it; this, if the tree be in a leaning position, or has a rough bark, is not difficult to him, and he rarely requires any other aid than his hands and feet; but if the bark be smooth, and the tree straight, or of very large dimensions, he requires the assistance of his stone hatchet, or of a strong sharp-pointed stick, flattened on one side near the point (called in the Adelaide dialect, "Wadna," in that of Moorunde "Ngakko,"); with this instrument a notch is made in the bark about two feet above the ground. In this the small toes of the left foot are placed, the left arm is employed in clasping the trunk of the tree, and the right in cutting another notch for the right foot, about two feet above the first; but a little to one side of it, the wadna or ngakko is now stuck firmly in the bark above, and serves to enable him to raise the body whilst gaining the second notch, into which the ball of the great toe of the right foot is placed, and the implement liberated to make a third step on the left side, and so on successively until the tree is ascended. The descent is made in the same manner, by clasping the tree, and supporting the feet in the notches. The principle of climbing in the way described, appears to consist in always having three points of contact with the tree, either two arms and one leg, or two legs and one arm.