FIG. 424. 



FIGS. 421-424. From sections of cat's ovary, showing ova and follicles in 

 different stages of development: a, a, a, a, germinal spots; 6, 6, 6, 6 germinal 

 vesicles ; c, e, c, c, ova ; d, d, d, zonse pellucidse ; e, e, e, e, corona radiata ; /, /, /, /, 

 thecae folliculorum ; g, beginning of formation of the cavity of the follicle- X*225 

 (Bohm and Davidoff). 

 636 



