1, Precardinal vein 



2, External jugular-cephalic vein 



3, Jugular lymphsac 



4, Duct of Cuvier 



5, Primitive ulnar vein 



6, Postcardinal vein 

 9, Brachial plexus 



10, Primitive ulnar lymphatic (haemo 



phoric stage) 



11, Brachio-cephalic anastomosis 



12, Anlages of subclavian vein 



IS, Anlages of subclavian lymphatics 



Anlages of subclavian or axillary 

 lymphatic sinus 



15, Common jugular lymphatico-ve- 



nous tap 



16, Jugulo-subclavian lymphatico-ve- 



nous tap 



17, Ventral prolongation from sub- 



clavian approach of jugular lym- 

 phatic sac to meet subclavian 

 and mediastinal systemic lym- 

 phatics (IS) 



294 



