FIGURES 208 AND 209 



208 Same, section 17. 



209 Same, section 19. 



2 Intersegment al arteries. 



3 Right azygos vein, thoracic portion. 



4 Atrophying embryonal vein, forming, kernel in interior of develop- 



ing and replacing lymphatic vein. 



5 Extraintimal or perivenous lymphatic space surrounding degener- 



ating embryonal vein. 



6 Left azygos vein, thoracic position. 



7 Aorta. 



8 Oesophagus. 



15 Interazygos venous plexus. 



