FIGURES 222 TO 225 



222 Same, section 28. 



223 Same, section 32. 



224 Same, section 34. 



225 Same, section 1. 



1 Sympathetic nerve. 



2 Intersegmental arteries. 



3 Right azygos vein, thoracic portion. 



4 Atrophying embryonal vein, forming kernel in interior of developing 



and replacing lymphatic space. 



5 Extraintimal or perivenous lymphatic space surrounding degenerat- 



ing embryonal vein. 



6 Left aeygos vein, thoracic portion. 



7 Aorta. 



8 Oesophagus. 



16 Interazygos venous plexus. 



