MUSCLES OF THE TRUNK. 



247 



from the sublumbar region by a tendon, which is confounded with that of its 

 congener. 



The peripheral muscular portion is continuous, by its concentric border, 



Fig. 118. 



JLU 



DIAPHRAGM OF THE HORSE; POSTERIOR FACE. 



1, 1', The two portions of the right pillar ; 2, Left pillar ; 3, Tendons of the pillars ; 



4, 4', Peripheral muscular portion ; 5, Left leaflet of the aponeurotic poi'tion ; 



5, 5', Right leaflet of the same ; 6, Posterior vena cava ; 7, (Esophagus passing 

 through the opening in the right pillar; 8, Posterior aorta between the two 

 pillars; 9, Cartilaginous circle of the ribs; 10, 11, Section of the psoas muscle; 

 12, Section of a lumbar vertebra; 13, Section of the common mass; 14, Retractor 

 muscle of the last rib; 15, Xiphoid appendage of the sternum. 



with the central aponeurosis. Its excentric border is divided into dentations. 

 Above, and on the left side, it nearly always joins the left pillar ; but ou 

 the right side it stops at a certain distance from the corresponding pillar, 



