The =coracoid= is a large flattened blade-shaped bone forming about one-third of the glenoid cavity. It does not meet its fellow in a ventral symphysis, and is terminated by a cartilaginous =epicoracoid=. The glenoid articulating surfaces of both scapula and coracoid are lined by a thick pad of cartilage. THE ANTERIOR LIMB. This is divisible into three portions, the =upper arm=, =fore-arm= and =manus=. The =upper arm= contains a single bone, the =humerus=. The =humerus= (fig. 40, A, 1) is a stout, nearly straight, somewhat flattened bone widely expanded at both ends. At the proximal end is the large hemispherical =head=, which articulates with the glenoid cavity. Behind the head the bone is drawn out into another large rounded process. Below the head the shaft bears a small outgrowth which is continuous with a larger one on the flexor surface (see p. 29). The bone is terminated distally by the =trochlea=, consisting of three partially distinct convex surfaces which articulate with the bones of the fore-arm. The =fore-arm= includes two bones, the =radius= and =ulna=; both these are small bones, and are immovably fixed to one another proximally and distally. The =radius= or pre-axial bone is the larger of the two, and is a rod-like bone terminated at either end by an epiphysis. It articulates at its proximal end with the humerus, and at its distal end with the radiale or scaphoid bone of the carpus. The =ulna= (fig. 40, A, 3) or postaxial bone is shorter than the radius, and more expanded at its proximal end, where it articulates with the humerus. It articulates distally with the intermedium (lunar) and the ulnare (cuneiform) bones of the carpus. All three bones of the arm have their terminations formed by epiphyses which ossify from centres distinct from those forming the shafts. The =Manus= consists of the =carpus= or =wrist= and the =hand= which includes the metacarpals and phalanges. The =carpus= consists of a series of ten small bones, one of which, the =pisiform= (fig. 40, A, 10), differs from the others in being merely an ossification in the tendon of a muscle. The remaining nine bones are arranged in a proximal row of three, the =ulnare= (fig. 40, A, 6), =intermedium=, and =radiale=, and a distal row of five (carpalia 1-5), each of which supports one of the metacarpals. A ninth bone, the =centrale= (fig. 40, A, 7), is wedged in between the two rows. The ulnare, intermedium and pisiform are comparatively large flattened bones, the others are small and cubical. The =hand=. This is composed of five digits, each of which consists of a metacarpal and of a varying number of phalanges. The =metacarpals=. The first metacarpal (fig. 40, A, 11) is a short flattened bone, the others are all elongated and cylindrical, and are terminated proximally by slightly concave surfaces, and distally by slightly convex ones.