THE THORACIC DUCT 

 Fig. 396, 



Fig. 397. 



Fig. 398. 



DIFFERENT VARIETIES OF THE THORACIC DUCT IN THE HORSE. 



A, Receptaculum chyli ; b, sublumbar branches ; c. anterior mesenteric branch ; d, posterior mesen- 

 teric branch. In Fig. 396 the duct is single, the usual condition, and enters the summit of the 

 anterior vena cava by two short branches. It is double in Fig. 397 ; and in Fig. 398 it has a 

 long branch that arises at the entrance to the thorax and joins the duct, by a retrograde course 

 near the pillars of the diaphragm. 



