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GEO. S. HUNTINGTON 



Figure 13 



1, Precardinal vein 



2, External jugular-cephalic vein 



3, Jugular lymphsac 



4, Duct of Cuvier 



6, Primitive ulnar vein 

 6, Postcardinal vein 



7, Mesenchymal blood-islands 



8, Anlages of primitive ulnar lym- 



phatic 



9, Brachial plexus 



11, Bi-achio-cephalic manastomosis 



