PLATE 8 



EXPLANATION OF FIGURES 



24 A section of the ovary from 1086 9 showing a follicle shortly after rup- 

 ture. The congestion in the theca folliculi is evident, bv, blood vessels. This 

 animal was killed at the end of the second stage or early beginning of the leuco- 

 cytosis, the third stage. 



25 A degenerating atretic follicle from the same ovary as figure 24, the 

 cells of the cumulus ociphorus are degenerating while the follicle is being invaded 

 by leucocytes. The ovum shows the first polar body in process of division while 

 the nucleus of the egg is represented by a small chromatic mass near the center. 



26 An early corpus luteum from animal 1104 ? killed during the third stage. 

 Near the corpus luteum is seen a degenerating atretic follicle invaded by leuco- 

 cytes. Compare smears figures 5, 6, 7 and 8, and sections of uterus figures 15 

 and 16, and section of vagina figure 17, all from the same animal. 



27 A somewhat older corpus luteum from 1099 9 killed during the hemor- 

 rhage stage. The vascularization of the corpus is apparent at the periphery 

 and is growing toward the center, hv, blood vessels. Compare the smear in 

 figure 9, and section of the uterus figure 18. 



280 



