PLATE 3 



EXPLANATION OF FIGURES 



10 Photograph from a section of ovary of an adult cat; Flemming's fluid; 

 saffranin. Four atretic follicles are shown. 



11 Camera lucida drawing of a medullary cord; ovary of kitten 3 to 4 days 

 P. P. Fat granules in the cells of the medullary cord are shown, as also the 

 intimate relation of the interestitial cells to the parenchyma. 



12 Camera lucida drawing of medullary cords; ovary of kitten, 3 to 4 days 

 P. P.; two cords shown in transection. 



13 Photograph of an interstitial cell-group from an adult ovary; cat; Flem- 

 ming's fluid; saffranin; to illustrate the lipoid content. 



14 Photograph of an interstitial cell-group. Zenker's fluid; iron hematoxy- 

 lin. The lipoid content is therefore dissolved out; some of the nuclei are appar- 

 ently pyknotic. 



15 Drawing, showing the location of interstitial cell-groups in relation to 

 the irregular medullary follicles. Kitten, about 5 to 6 weeks old. X 100. The 

 interstitial cell-groups are shown in black. 



16 Drawing, as in figure 15. 



94 



