FIGURES 234 TO 237 



234 Same, section 10. 



235 Same, section 21. 



236 Same, section 27. 



237 Same, section 28. 



4 Atrophying embryonal vein, forming kernel in interior of developing 



and replacing lymphatic space. 



5 Extraintimal or perivenous lymphatic space surrounding degenerating 



embrvonal vein. 



