FIGURES 202 AND 203 



202 Same, section 30. 



203 Same, section 31. 



1 Sympathetic nerve. 



3 Right azygos vein, thoracic ])orti()n. 



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



ing and replacing lymphatic space. 

 .^ Extraintimal or perivenous lymphatic s|)ace surrounding degener- 

 ating embryonal vein. 



6 Left azygos vein, thoriicic portion. 



7 Aorta. 



8 Oesophagus. 



34 Ventro-mcdial azygos plexus. 



