198 THE ARTISTIC ANATOMY OF ANIMALS 



poinds) (Fig. 76, 14). — As wc have already pointed out, 

 this muscle is represented in quadrupeds by the radial 

 bundle of the deep flexor of the digits, so that the two 

 muscles are in reality blended the one to the other. This 

 union is sometimes found, but only as an abnormality, in 

 the human species. We have met some examples of this 

 in the course of our dissections. 



Pronator Quadratus. — This muscle conforms to the general 

 law which we have already pointed out in connection with 

 those which have for their action the rotation of the radius 



EJiC 



Fig. 81. — Diagram of the Pos- 

 terior Part of a Trans- 

 verse Section passing 

 through the middle of 

 THE Left Fore-limb of the 

 Dog : Surface of the 

 Inferior Segment of the 

 Section. 



. I, Radius; 2, ulna; 3, pos- 

 terior ulnar ; 4, anterior ulnar ; 

 5, great palmar (flexor carpi 

 radidlis) ; 6. flexors of the digits. 



Ei C. 



Fig. 82. — Diagram of a Hori- 

 zontal Section of the 

 Middle of the Forearm of 

 THE Left Leg of the Horse : 

 Surface of the Inferior 

 Segment of the Section. 



I, Radius ; 2, ulna; 3, posterior 

 ulnar ; 4, anterior ulnar ; 5, great 

 palmar (flexor carpi radialis) ; 6, 

 flexors of the digits. 



around the ulna. We remember, indeed, that when the 

 bones of the forearm are fused with one another, the muscles 

 which are destined to produce a mobility which has then 

 become impossible disappear at the same blow. 



For this cause we do not find the square pronator in 

 either the ox or the horse, but can demonstrate its presence 

 in the dog and the cat. 



It is very deeply situated. This is why, and also on 

 account of the plan which we have traced lor ourselves, we 

 will simply say that it is situated on the postero-internal 



