FIGURKS 124 AND 12r. 



124 Same, section 5. 



125 Same, seotion 6. 



3 Kight ])recaval vein. 



4 Atrophying embryonal vein, forming kernel in interior of developing 



and replacing lymphatic space. 



5 Extraintimal or perivenous lymphatic space surrounding degenerat- 



ing end^ryonal vein. 



7 Aorta. 



9 Trachea. 



10 Pulmonary artery. 



18 Peritracheal venous ide.xus. 



22 Vagus. 



32 Ventral mediastinal venous |)lcxus. 



