This consists of the scapula (Pl. VIII. figs. 6, 7, 8 & 9, 51), coracoid (ib. figs. 4 & 5, 52), and clavicle (ib. 58), the latter ending in a point and here tied by ligament to its fellow, to form a furculum. I have received the elements of this arch in three conditions:—one in which the bones, though of full size, are separate; a second, in which the scapula and coracoid are confluent, but the clavicle distinct; a third, in which the three bones are confluent at the ends converging to the humeral articulation. The scapula (ib. figs. 6, 7, 8 & 9, 51), 3 inches 7 or 8 lines in length, has the usual sabre-shaped body, slightly expanding and decurved at its free extremity, the breadth of which is 7 lines: it terminates obtusely: varieties of shape are shown in figures 6 & 8. The outer surface of the bone, at the two posterior thirds of its extent, is slightly concave and marked by muscular attachments; the inner surface of that part is smooth and slightly convex: the bone increases in breadth, with some diminution of thickness, towards the articular end, and is remarkable for sending off from the lower border, at 7 or 8 lines from that end, a short process (ib. 51); between this process and the articulation the breadth of the bone is little more than 3 lines; the breadth of the articular end is 9 lines. Nearly one-half of it is occupied by the almost flat, subcircular humeral surface (fig. 8, _a_), with a diameter of 4½ lines, and directed upward, outward, and a little forward. From this is continued an oblong, much narrower coracoidal surface, beyond which the acromial process (fig. 6, _c_) extends forward, curving toward the coracoid, and terminating obtusely.