38 DISSECTION OF THE CAT 



b. The second and most external part arises 

 from the head of the humerus, beneath the inser- 

 tion of the teres minor. Its fibres pass downward, 

 and are inserted by a tendon on the olecranon 

 process. (Plates II. and III.) 



c. The third division arises just below the head 

 of the humerus, between the origin of the second 

 division (b) and the insertion of the coraco-brachi- 

 alis. It passes downward and unites with the 

 fourth part (d), and both are inserted on the ole- 

 cranon process. (Plates III. and IV.) 



d. This division arises from the upper part of 

 the shaft of the humerus, below the insertion of 

 the teres major. Its fibres unite with those of the 

 third division (c), and are inserted on the olecra- 

 non process. (Plate IV.) 



e. The smallest part of the triceps arises from 

 the bridge of bone bounding the supracondyloid 

 foramen of the humerus, as far down as the inter- 

 nal condyle. Its fibres pass back to their insertion 

 on the inner side of the olecranon process. 



23. The Anconeus Muscle arises from the lower 

 half of the shaft of the humerus, the margins of 

 the olecranon fossa, and the external condyle. 

 Its fibres pass between the second (6) and third 

 (<:) parts of the triceps, to their insertion in the 

 fossa just outside the olecranon process. (Plates 

 II. and III.) 



