CONTENTS. Xlll 



CHAPTER III. 



THE EGG AND THE FEMALE ORGANS OF GENERATION. 



PAGE 



Constitution of the egg Yitelline membrane Vitellus Ovaries and Ovi- 

 ducts Action of the oviducts and female generative passages In the frog 

 In the fowl Uterus and Fallopian tubes in quadrupeds In the human 

 species 685-694 



CHAPTER IV. 



THE SEMINAL FLUID AND THE MALE ORGANS OF GENERATION. 



The spermatozoa Their anatomical characters Their movement Forma- 

 tion of the spermatozoa Accessory male organs of generation Necessary 

 conditions of fecundation by the seminal fluid Union of the sexes . 695-702 



CHAPTER V. 



PERIODICAL OVULATION AND THE FUNCTION OF MENSTRUATION. 



Periodical ovulation Original existence of eggs In ovipara In vivipara 

 Complete development of the ovarian egg Condition of puberty Ripen- 

 ing and discharge of the ovarian egg OEstruation Menstruation Its 

 appearance and periodicity Phenomena of menstruation Ovulation at 

 the menstrual period 703-712 



CHAPTER YI. 



THE CORPUS LUTEUM, AND ITS CONNECTION WITH MENSTRUATION 

 AND PREGNANCY. 



Origin of the corpus luteum Corpus luteum of menstruation Hemorrhage 

 into the Graafian follicle Hypertrophy of the vesicular membrane De- 

 colorization of the clot Yellow coloration of the convoluted wall Atrophy 

 and disappearance of the corpus luteum of menstruation Corpus luteum 

 of pregnancy Its growth and duration Its disappearance after delivery 

 Distinguishing marks of the corpus luteum, in menstruation and pregnancy 



713-720 



CHAPTER VII. 



DEVELOPMENT OF THE IMPREGNATED EGG. 



Changes in the egg before leaving the ovary Deposit of albuminous layers 

 in the Fallopian tube Segmentation of the vitellus Blastoderm, or ger- 

 minal membrane External and internal blastodermic layers Formation 

 of organs in the embryo Embryonic spot Area pellucida Primitive 

 trace Medullary groove Medullary canal Dorsal plates Abdominal 

 plates Chorda dorsalis Changes of form in the frog's embryo Growth of 

 the limbs Disappearance of the tail Transformation of the tadpole into 

 the frog 721-728 



