1891.] 



ANATOMY OF THE KAGTJ. 



13 



extends about halfway down the humerus, being therefore larger 

 than in the Herons. 



(6) The AnconcBus longus arises from the neck of the scapula by 

 two distinct origins ; one is chiefly fleshy, the other is formed by a 

 short stout tendon and is placed nearer to the free end of the scapula 

 than the other. The niuscle is, as has been already mentioned, 

 attached to the humerus by a flat tendon which joins that of the 

 posterior latissimus dorsi. The presence or absence of this tendon 



Bi.i 



Muscles of fore limb of Ehinochetus. 



Z>, 2)^ deltoid; L.d. 1, L.d.2, latissimi dorsi ; Bi.l, biceps; Bi.2, accessory 



biceps ; N, nerve. 



is often a fact worth noting for classificatory purposes. Most of 

 the allies of Ehinochetus, however, are provided with the tendon in 

 question. 



(7) The Biceps (fig. 2, jBj.I) arises by two distinct heads, as is 

 so generally the case among birds, by a long slender tendinous 

 head from the coracoid and by a broad fleshy origin from the humerus. 

 Just at its insertion the tendon of the muscle divides into two, one 

 being attached to the radius, the other to the ulna. 



