82 The Alligator and Its Allies 



scapula. The coracoid is a flattened bone, wide 

 at either end and narrow in the middle, so that in 

 a dorsal view it is shaped like an hourglass. It 

 is decidedly curved, with the convex side down. 



Its outer edge ar- 

 ticulates with the 

 scapula and is 

 thickened to form 

 the anterior border 

 of the glenoid cav- 

 ity. Its median 

 end is attached to 

 the sternum. Near 

 its scapular articu- 

 lation there is a 

 well-marked fora- 

 men that passes 

 entirely through 

 the bone. The 

 episternum (e) or 

 interclavicle was 

 described in con- 

 nection with the 

 sternum and ribs. 

 There is no clavicle nor other coracoid elements. 



The anterior limb consists of the usual parts, 

 the upper arm, forearm, and manus. The hu- 

 merus (Fig. 27, Ji) is rather thick in proportion to 

 its length; it has an elongated articular surface at 

 its proximal end for articulation with the glenoid 



FIG. 27. PECTORAL GIRDLE AND 

 ANTERIOR LIMB. 



c, coracoid; ce, centrale; cl, claw; e, episternum; 

 h, humerus; m, metacarpals; p, pisiform; r, 

 radius; r 1 , radiale; s, scapula; u, ulna; 

 u , ulnare. 



