132 THE ARTISTIC ANATOMY OF ANIMALS 



sternum ; the sterno-aponeurotic portion then representing 

 the inferior fasciculae of the same muscle. 



The great pectoral muscle of one side is separated from 

 that of the opposite side along the median line, and especi- 

 ally above and in front, by a groove which is more or less 

 deep, according as the muscles are more or less developed. 

 At the bottom of this groove, suggestive of that which 



L^s C 



Fig. 66. — Myology of the Horse : Anterior Aspect of the Trunk. 



I, Pectoralis major (sterno-humeral) ; 2, pectoraUs major (sterno- 

 aponeurotic) ; 3, mastoido-humeralis ; .4, point of the shoulder ; 5, sterno- 

 mastoid or sterno-maxillary : 6, inferior portion of the platysma myoides 

 of the neck, divided ; 7, triceps cubiti ; 8, brachiahs anticus ; 9, radialis 

 (anterior extensor of the metacarpus) ; 10, scapular regiop. 



exists in the corresponding region in man, is found, as in 

 this latter, the median portion of the sternum. 



The preceding description particularly applies to the 

 arrangement which the great pectoral presents in the horse ; 

 in other animals it is marked by some distinctive characters. 

 In the pig, it is inserted into the sternum as far only as the 

 level of the third costal cartilage ; in the ox and sheep, it 



