FIGURES 248 TO 251 



248 Same, section 19. 



249 Same, section 20. 



250 Same, section 21. 



251 Same, section 22. 



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



ing and replacing lymphatic space. 



5 Extraintimal or perivenous l^'mphatic space surrounding degen- 



erating embryonal vein. 



