1894.] ANATOMY OF PALAMEDEA CORNUTA. 545 



represented by a broad tendinous slip. From this the thickened 

 anterior edge goes to the longus and the broader thinner portion 

 to the brevis. A band of tendon arising from the humeral ridge 

 also runs to the brevis. 



The longus tendon passes straight along the edge of the 

 patagium and gives off to the brevis a rather widish slip, which 

 goes to the brevis just at the emergence of the nerve. 



The hrevis tendon is thickened on the outer side ; the nerve 

 passes beneath the outer half of it and superficial to the inner 

 half, but there are no signs of distinct division of the tendon into 

 two. Just below the emergence of the nerve a branch is given off 

 which is fused below with the fleshy head of the extensor meta- 

 carpi radialis. Another branch is given off on the outer side, 

 which is inserted in common with the origin of the extensor 

 metacarpi radialis tendon. The main part of the tendon passes 

 towards the elbow, and ends on the radius by a short tendon. 



There is no biceps patagialis. 



Teres major. — This arises from the whole of the outer border of 

 the scapula. Its tendon is inserted on to the great tuberosity of 

 the humerus distal to the biceps. 



Teres minor {supraspinatus). — This is an excessively delicate and 

 slender muscle. It arises from the lower border of the scapula 

 anteriorly, and is inserted on to the humerus between the two 

 beads of the triceps. 



Subscapular is. — There are two heads of origin, from the anterior 

 half of the under surface of the scapula ; the deep head is also 

 from the coracoid. Both are fleshy, and the superficial muscle 

 arises exactly above the scapular head of the deeper muscle, the 

 first part of the serratus anticus being inserted between the two. 

 The two parts of the muscle fuse about half\^ay between origin 

 and insertion. 



Expansor secundariorum. — This arises fleshy from the quills 

 covering the elbow-joint, and ends in a characteristically ciconiine 

 manner. 



Biceps. — The long head arises in common with the deltoid ; the 

 short head in common with the insertion of a portion of the 

 pectoralis major. The latter head is narrow. The insertion of the 

 muscle is double, and the division into two parts commences in the 

 fleshy belly of the muscle. The radial tendon is more than twice 

 the width of the other, and itself divides into two. 



Ancomeus longus. — It arises by a forked tendinous head from 

 the scapula, the lower head being thicker than the upper. There 

 is a double accessory head formed by two equisized tendons separated 

 by a space, across which run two tendinous bars. "With the upper 

 of these the tendon of the latissimus dorsi posterior is fused and 

 the extreme superior tip of the latissimus dorsi anterior fuses with 

 the lower accessory head. There is a broad tendinous insertion 

 to the ulna, and on to the fascia covering the elbow-joint. 



Triceps. — This arises right down the humerus, and the origin 

 bifurcates above. 



