330 



REPRODUCTION 



liquor folliculi. At one point in its circumference the membrana 

 granulosa is much thickened, and in this thickened portion 

 is imbedded the ovum. The epithelial cells of the membrana 



FIG. 94. Section of the ovary of a cat, showing the origin and development 

 of Graafian follicles. (From Yeo after Cadiat.} 



a, germ epithelium; b, Graafian follicle partly developed; c, earliest form of 

 Graafian follicle; d, well-developed Graafian follicle; e, ovum;/, vitelline membrane; 

 g, veins; h, i, small vessels cut across. 



completely surround the ovum, constituting the discus proligems. 

 The cells of the discus next the ovum have their long axes at 



