1, Precardinal vein 1, 



2, Dorso-medial somatic tributary 2, 

 7, Brachio-cephalic venous anastomo- 7, 



sis 



11, Thoracic duct approach 15, 



12, Thoracic duct anlages 16, 



13, Jugular lymphsac, preparing to 17, 



reenter veins and to establish 18, 

 secondary connections with an- 

 lages of thoracic duct (12) and of 

 other systemic lymphatics {14) 



278 



Figure 11 



Precardinal vein 



Dorso-medial somatic tributary 



Brachio cephalic venous anastomo- 

 sis 



Jugular lymphsac 



Permanent lymphatico-venous tap 



Thoracic duct 



Jugular and cephalic systemic lym- 

 phatics 



A 



