EXPLANATION OF FIGURES 238, 239 AND 240 



238 Same, section 29. 



239 Same, section 30. 



240 Same, section 31. 



4 Atrophying embryonal vein, forming kernel in interior of developing and 

 replacing lymphatic space. 



5 Extraintimal or perivenous lymphatic space surrounding degenerating 

 embryonal vein. 



