PLATE 5 



EXPLANATION OF FIGURES 



10 Later stage of solid discharged follicle, showing large development of 

 yellow pigment in lutear masses (X 40). 



11 Part of figure 10 at greater magnification (X 176), showing pigment 

 particles. 



12 Atretic follicles in hen ovary, with yolk spheres in central cavity (X -10). 



13 Part of figure 12 at greater magnification (X 176). Lutear cells (/) show 

 in theca interna and also among yolk spheres in the cavity. 



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