510 



ANATOMY OF VERTEBRATES. 



and inward, over the subclavian artery to reach the angle of union 

 between the left subclavian, s, and internal jugular,^', veins, at 

 which point it empties itself into the venous system by one or 

 more branches. The corresponding veins on the right side also 



399 



Absorbent trunks of inguinal and lumbar regions, with receptaculum chyli ; Human, clxx » 



receive lymph, but usually by a short trunk, ib. c. There have 

 been observed, in Man, varieties which are more constant in some 

 lower Mammals, as, e.g., a double ' thoracic duct,' one terminating 

 in the left, the other in the right subclavian vein ; a bifurcation 

 of the duct at a higher or lower level, one branch terminating in 

 the angle of union of the subclavian and internal jugular veins of 

 the left side, the other emptying itself either into the correspond- 

 ing point on the right side or joining the right lymphatic trunk. 



