THE SKELETON 



29 



surface of the proximal third of the humerus, and the bicipital 

 groove for the tendon of the biceps muscle lies on the cranio- 

 medial surface between the greater and lesser tuberosities. 



The antibrachium is comprised of two slightly curved bones, 

 the radius and ulna (Fig. 13). As in man, the radius is 

 shorter than the ulna and forms the major part of the anti- 

 brachial articulation with the carpus. However, in the 

 rabbit there is very httle rotation of the hand, due to the 



Fig. 10. — Right scapula, A, lateral; and B, glenoid view. C, coracoid process; 

 CB, coracoid (cranial) border; GB, glenoid (axillary) border; GC, glenoid 

 cavity; lA, inferior (glenovertebral angle; IF, infraspinous fossa; IG, infra- 

 glenoid tubercle; MP, metacromial process; S, spine; SA, superior (coracocranial, 

 craniovertebral) angle; SF, supraspinous fossa; SG, supraglenoidal tubercle; 

 VB, vertebral border. 



manner of articulation of the radius at the semilunar notch 

 where it is flattened against the ulna instead of having a 

 rotating head, as in man and the cat. The proximal end 

 of the radius is concave and grooved to fit the medial trochlea 

 on the distal end of the humerus. The ulna is the longer of the 

 two bones and plays a more important part in the articulation 

 of the brachial and antibrachial bones. There is a distinct 

 nutrient foramen on the medial side near the distal end of the 

 proximal third of the ulna. 



The carpus has nine bones roughly arranged in two rows. 

 From the radial side the bones of the proximal row are the 



