X LIST OF ILLUSTRATIONS 



KK,. I'AGE 



21. Section through wall of vagina of monkey : . .32 



From Marshall's " Physiology of Reproduction.'" 



22. Section of mammary gland (human) during lactation . 34 



From MarshalVs " Physiology of Reproduction!" 



23. Diagram illustrating reduction of chromosomes in the 



PROCESS of maturation OF OVUM .... 36 



From " Grays Anatomy." 



24. Diagram illustrating swimming spermatozoon . . . 39 



From MarshalVs " Physiology of Reproduction." 



25. Section through procestrous uterine mucosa of "dog . 44 



From Marshall's " Physiology of Reproduction." 



2(). Section through uterine mucosa of dog after end of 



procestrum ......... 46 



From Marshall's " Physiology if Reproduction." 



27. Discharged follicle of rabbit nineteen hours after 



COITION ......... 47 



From Marshall's " Physiology of Reproduction." 



28. Section through portion of uterine mucosa of sheep . 48 



From Marshall's " Physiology of Reproduction." 



29. Section through mucosa of human uterus, showing 



pre-menstrual congestion . . . . . . 52 



Frotn Marshall's " Physiology of Reproduction.'" 



30. Section through mucosa of human uterus, showing 



extravasation of blood ...... 53 



From Marshall's " Physiology of Reproduction." 



31. Section through mucosa of human uterus, SH0W^NG 



sub-epithelial h.5;matomata ...... 54 



From Marshall's " Physiology of Reproduction." 



32. Section through mucosa of menstruating human uterus 54 



From Marshall's " Physiology of Reproduction." 



33. Section through human uterus during recuperation stage 55 



From Marshall's " Physiology of Reproduction." 



34. Segmentation of a mammalian ovum .... 60 



From " Quain's Anatomy." 



35. Section through blastodermic vesicle of bat ... 61 



From " Gray s Anatomy" 



36. Section through embryonic disc of bat . . . . 61 



From " Gray' s Anatomy." 



37. Diagram showing first differentiation of formative cell 



mass .......... 



From " Gray's Anatomy." 



38. Diagram showing early stages in the formation of the 



amnion and archenteron ...... 



From " Gray's Anatomy." 



39. Diagram showing the commencing formation of the extra- 



embryonic CCELOM ....... 



From " Gray's Anatomy." 



40. Diagram showing the extension of the mesoderm . 64 



From " Gray's Anatomy." 



63 



63 



63 



