CONTENTS. 



SECTION IV. 

 REPRODUCTION. 



CHAPTER I. 



NATURE OF REPRODUCTION, AND THE ORIGIN OF PLANTS AND 



ANIMALS. 



PAGE 



Phases of Existence in Plants and Animals Their Eeproduction Repro- 

 duction by Generation Resemblance of Progeny to Parents Sponta- 

 neous Generation Sources of Error Reproduction of Entozoa Of Cys- 

 ticercus Cellulose Of Trichina Spiralis Of Infusoria Of Bacteria 

 Conclusion in Regard to Spontaneous Generation Sexual Generation 569-583 



CHAPTER II. 



THE EGG AND FEMALE ORGANS OF GENERATION. 



Constituent Parts of the Egg Vitelline Membrane Vitellus Germina- 

 tive Vesicle Germinative Spot Ovaries and Oviducts Action of the 

 Oviducts and other Generative Passages Formation of the Fowl's Egg 

 Female Generative Organs in Quadrupeds and Man Fallopian Tubes 

 Uterus 584-591 



CHAPTER III. 



THE SPERMATIC FLUID AND MALE ORGANS OF GENERATION. 



The Spermatozoa Their Anatomical Characters Their Movement Their 

 Formation Accessory Male Organs of Generation Conditions of Fecun- 

 dation by the Spermatic Fluid Penetration of Spermatozoa into the 

 Egg Their Union with the Vitellus Sexual Congress Fecundation of 

 the Egg in the Generative Passages 592-598 



CHAPTER IV. 



OVULATION AND MENSTRUATION. 



Ovulation Original Formation of Eggs in the Ovaries Their Periodical 

 Development and Discharge Rupture of the Graafian Follicle Escape 

 of the Egg Accompanying Phenomena Menstruation Phenomena of 

 the Menstrual Period Ovulation in Menstruation Relations of the 

 Menstrual Flow to the Discharge of the Egg Passage of the Egg through 

 the Fallopian Tube Abnormal Location of the Impregnated Egg Ova- 

 rian, Abdominal, and Tubal Pregnancies Source of the Menstrual Hem- 

 orrhage 599-607 



CHAPTER Y. 



THE CORPUS LUTEUM, AND ITS CONNECTION WITH MENSTRU- 

 ATION AND PREGNANCY. 



Obliteration of the Ruptured Graafian Follicle Its Conversion into a Cor- 

 pus Luteum COKPUS LUTEUM OF MENSTRUATION Rupture of the Graa- 



