14:8 PRACTICAL MICROSCOPY. 



(H.) 



3. The primordial ova of the surface epithelium. 



4. The projecting lines or chains of epithelium undivided. 

 (Here the cells seem rather elongate.) 



5. Chains which are in process of subdivision. 



6. Young Graafian follicles in columns at right angles to the 

 surface of the ovary. 



7. The discus proligerus, in many instances yet composed of flat- 

 tened cells. 



FIG. 99. SECTION OF OVARY OF CHILD. DEATH TEN DAYS AFTER BIRTH, x 350. 



A. Germinal epithelium, covering surface of the ovary. 



B. Primitive ova. 



C. C. Projection of surface epithelium within the organ. 



D. Constriction of the projected chain or cord of epithelium and isolation of portions to form 

 Graafian follicles. 



E. Chain of Graafian follicles. The stroma is seen filled with previously formed follicles 

 which have become now isolated. 



F. A large Graafian follicle. It has been cut in half; the ovum has fallen out; and the mem- 

 brana granulosa is seen lining the cup-shaped cavity. 



G. Large arteries of the central portion of the ovary. 



8. Follicles showing discus proligerus as columnar cells. 



9. Follicles showing great proliferation of discus prolig- 

 erus. 



