240 



HENRY K. DAVIS 



SUMMARY 



The thoracic duct may be double throughout its entire extent, 

 one channel lying on each side of the aorta and opening into the 

 venous system of the corresponding side. This type of duct is 

 similar to the diagram, figure 1. Ducts of this type have been 

 described by four authors. 



The thoracic duct may be partially doubled and open into the 

 venous system of the left side (figs. 10-15). This type of duct 



TABLE 1 

 Termination 



TABLE 2 



Parsons and Sargent's cases 



Termination 



