A Study of the follicular Epithelium from the Ovary etc. 643 
Fig. 2. Longitudinal sectiou, one side only, of three of the youngest 
chambers, VI, VII and VIII of figure A. X 1400. 
Fig. 3. Section of a part of the wall of chamber V, figure A. X 1400. 
Fig. 4. Section showing part of the wall of chamber III, figure A. X1400. 
Fig. 5. Same from chamber II. X 1400. 
Fig. 6. Same from chamber I. X 1400. 
Fig. 7. Sect on of a portion of the wall of a chamber in which the oücyte 
was 0,125 mm long. X 1400. 
Fig. 8. Same from a slightly older chamber. X 1400. 
Fig. 9. Four epithelial cells from a chamber a little older than the last. 
X 1400. 
Fig. 10. Section of a part of the wall of a chamber about the same age 
as the last. X 1400. 
Fig. 11. One dividing and two resting cells from the wall of a still older 
chamber. X 1400. 
Fig. 12. A number of epithelial cells from anotlier chamber; p. 1., outer 
layer of the oöcyte. X 1400. 
Fig. 13. One dividing and one resting cell from a chamber containing 
an oöcyte 0,19 mm long. X 1400. 
Fig. 14. Two epithelial cells: the upper one shows a portion of the nucleus 
in process of being thrown out of the cell. X 1400. 
Fig. 15. Three epithelial cells; the two lower showing the peculiar arrange- 
ment of the chromatin granules which may be preparatory to part of the nucleus 
being ejected from the cell. X 1400, 
Fig. 16. Three epithelial cells: the upper cell shows au earlier stage of 
what is represented in two cells of the last drawing; the central cell after 
completion of nuclear division. X 1400. 
Fig. 17. Two resting and one dividing cell from another chamber showing 
arrangement of the active, darker, cells among the resting ones. X 1400. 
Fig. 18. Surface view of a portion of a chamber showing arrangement of 
the active, darker, cells among the resting ones. X 1490. 
Fig. 19. Section of four cells from another part of the same chamber. 
X 1400. 
Fig. 20. Transverse section of a chamber showing variations in lenght 
of the cells especially those at that part of chamber where the ridge on the 
chorion will be formed. X 90. 
Fig. 21. Three cells which have reached their maximum length. X 1400. 
Fig. 22. Three epithelial cells which have begun to shorten. The nuclei 
show the change in length and breadth which they first undergo. X 1400. 
Fig. 23. Outline drawing of four epithelial cell nuclei. These show the 
constrictions in the middle which appear after the nuclei have begun to shorten. 
X 940. 
Fig. 24. Three cells from section of an old chamber; the nuclei show 
early stages of bending. The chorion, ch, is being formed. X 740. 
Fig. 25. Section from an older chamber showing the nuclei more bent, 
chorion not drawn. X 740. 
Fig. 26. Portion of a section of an older chamber. The chorion, ch, is 
nearly formed; the cells and nuclei have become smaller. X 740. 
Fig. 27. Surface view of three nuclei. This is characteristic for any of 
the old chambers. X 740. 
