MYOLOGY 189 



tongue situated on the internal side of the elbow (Fig. y^) 

 m a horse which we dissected many years ago in the labora- 

 tory of the School of Fine Arts. Moreover— and the fact 

 seemed to us an interesting one — the forearm to which the 

 muscle belonged had an ulna of relatively considerable 

 development (Figs. 79 and 80).* 



This muscle is a pronator. 



Flexor Carpi Radialis (Fig. 76, 10 ; Fig. yj, 7). — 

 Called by veterinary anatomists the internal flexor of the 

 metacarpus, this muscle, which is found on the internal 

 aspect of the forearm, is situated behind the pronator 

 teres when this muscle exists, whilst in the animals which 

 are deprived of the latter the flexor carpi radialis has in 

 front of it the internal border of the radius, which separates 

 it from the anterior extensor of the metacarpus. 



It is necessary to add that the flexor carpi radialis is 

 similarly separated from the anterior extensor of the meta- 

 carpus by the internal border of the radius in animals 

 in which the pronator teres exists, but then only in that part 

 of the forearm which is situated below this latter. 



The flexor carpi radialis arises from the epitrochlea. Its 

 fleshy body, fusiform in shape, descends vertically, and 

 terminates in a tendon on the posterior surface of the 

 bases of the second and third metacarpals in the dog and 

 the cat, on the metacarpal of the large internal digit in 

 the pig, on the internal side of the metacarpus in the ox, 

 and on the superior extremity of the internal rudimentary 

 metacarpal in the horse. 



We see clearly, in this latter, a superficial vein which, in 

 the shape of a strong cord, passes along the anterior border 

 of the flexor carpi radiahs ; it is the subcutaneous median 

 or internal vein, which, forming the continuation of the 

 internal metacarpal vein, joins the venous system of the 

 arm, after having crossed obhquely the corresponding part 

 of the radius. 



Palmaris Longus. — ^This muscle, which exists distinctly in 



* Edouard Cuyer, ' Abnormal Length of the Ulna and Presence of a 

 Pronator Teres Muscle in a Horse' {Bulletin de la Society d'Anthrnpologie, 

 Paris, 1887). 



