92 



THE CAT. 



[CHAP. iv. 



blunt prominences. One of these (Fig. 54, t l ) and (Fig. 53, l f) 

 termed the greater (radial* or preaxial) tuberosity, is on the outer 

 side of the summit of the bicipital groove. It reache s considerably 

 above the summit of the head of the humerus. At its hinder end is 



a 



Fig. 53. THE RIGHT HUMERUS. 



A. Front. 



B. Back. 



C. Summit. 



D. Lower end, with its hinder margin at 



the upper border of the figures. 

 a. Trochlea. 

 frjr. Bicipital groove, 

 c. Capitellum. 

 ce. External condyle. 

 ci. Internal coudyle. 



dr. Deltoid ridge. 



/c. Supra-condyloid foramen. 



h. Head. 



o. Olecranal fossa. 



p. Surface for iufra-spinatus. 



rs. Supinator ridge. 



t. Inner margin of trochlea. 



y. Great tuberosity. 



2 /. Lesser tuberosity. 



a conspicuous depressed surface (p), for the insertion of the infra- 

 spinatus muscle. The other smaller prominence is called the lesser 

 (ulnar, or post-axial), titberosity (Fig. 54, t 2 ) and (Fig. 53, 2 /), and 



* " Radial" because on the side of the I is vertical, it is in front of the long axis 

 radius, " pre-axial" because when the arm ' of the arm. 



