496 



COLLEGE ZOOLOGY 



the acetabulum (Ac), in which the head of the long leg bone 

 (femur) lies. 



The fore limbs (Fig. 420, A) consist of a humerus which articu- 

 lates with the glenoid fossa of the pectoral girdle at it's proximal 



?«..{■.. 



Fig. 419. —Skeleton of the frog. A, pectoral girdle, cl, clavicle; cor, cora- 

 coid; ep, episternum; ep.c, epicoracoid; gl, glenoid cavity; mes, mesosternum; 

 os, ommosternum; sc, scapula; s.sc, suprascapula; xi, xiphisternum. B, pelvic 

 girdle, side view. Ac, acetabulum; 77, ilium; Isch, ischium; Pu, pubis. 

 (From Bourne, after Ecker.) 



end and with the radio-ulna (ru) at its distal end. The bone of 

 the forearm (radio-ulna) consists of the radius and ulna fused. 

 The wrist contains six bones: the ulnar e (w), radiale (r), inter- 



