ILLUSTRATIONS 



FIG. PAGE 



1. Diagram illustrating the " Wellenbewegung " hypothesis . 67 



2. Transverse section through Fallopian tube showing folded 



epithelium and muscular coat . . . . . .76 



3. Seition of a cornu of a rabbit's uterus ..... 77 



4. Cross-section through cervical canal of human uterus . . 78 



5. Section through wall of vagina of monkey (upper part) . 79 



6. Section through wall of vagina of monkey (lower part) . . 81 



7. Se tion through mucosa of human uterus showing pre-menstrual 



congestion 82 



8. Section through mucosa of human uterus showing extravasation 



of blood 84 



9. Section through mucosa of human uterus showing sub -epithelial 



hsematomata ......... 86 



10. Section through mucosa of human uterus showing bleeding into 



the cavity during menstruation . . . . .87 



11. Section through mucosa of human uterus during the recupera- 



tion stage .......... 88 



12. 13. Sections through prooestrous uterine mucosa of dog . 100-101 



14. Section through edge of mucosa of dog during an early stage 



of recuperation ......... 103 



15. Section through portion of mucosa of dog during recuperation 



period 104 



16. Section through portion of mucosa of dog during lats stage of 



recuperation ......... 105 



17. Section through portion of prooestrous uterine mucosa of rabbit 



showing glandular activity . . . . . .106 



18. Section through portion of uterine mucosa of sheep, showing 



black pigment formed from extravasated blood . .109 



19. Section through ovary of cat . . . . . . .114 



20. Section through ovary of adult dog . . . . .115 



21. Section through ovary of pig embryo 116 



22. Cortex of pig embryo showing germinal epithelium, &c. . .117 



23. Various stages in the development of the Graafian follicle 



(rabbit) 119 



xiii 



