(From Metacarpion Metacarpus 4964 after, and the wrist,) that part of the hand situated between the wrist and the fingers. The ancients called the carpus brachiale,and the metacarpus post brachial. It forms on the inside the palm, and on its outside the back of the hand, but the first phalanx of the thumb is not a part of the metacarpus. The metacar-pal bones support the fingers. Each bone of the metacarpus is long and flatted at the em surface of each body is concave, with a sharp ridge in the middle to separate the interosseous muscles. The ends next the arm have a hollow, for the articulations of the carpus; and those next the fingers are distinguished by protuberances for fixing the ligaments that unite these bones. A rough ring is observable round their heads, where the capsular ligaments that unite them to the fingers are fixed. These bones are united to the carpus and to each other by surfaces almost plain, as little motion is required; and, in those of the foetus, each end is usually cartilaginous. The hollow of the hand is formed by the concavity of the fore part of these bones, and, from the minute motion of which they are susceptible, they form a secure basis for the action of the fingers.