THORAX AND ABDOMEN OF THE HORSE 



83 



end in a relatively thin, but extensive, aponeurotic tendon. The line of 

 separation between the muscular and tendinous portions runs obliquely 



Last thoracic nerve 



Branch of a. circumflexa 

 ilium profunda. i 



N. iliohypogastricus. | 



N. ilioinguinalis. \ 1 



I M. intercostalis externus. 



M. serratus dorsalis. 



; M. longissimus dorsi. 



M. iliacus. 



Icutaneus femoris lateralis. 



Branch of a. circumflexa j 

 ilium profunda. 



M. obliquus internus abdominis. 



M. obliquus externus abdominis. 



Fig. 38.— Dissection of the right flank after removal of part of the external 

 oblique abdominal muscle. 



from the tuber coxa? to the cartilage of the twelfth or thirteenth rib. 

 The line is not straight, but has a fiat caudo-ventral convexity. 



A comparatively small part of the muscle, namely, that associated 

 with the last rib, has a fleshy insertion to the tuber coxse. The re- 

 maining insertion is tendinous, and of some degree of complexity. The 



