CONTENTS 



PAOB 

 INTBODUCTION - 1 



CHAPTER I 



THE BREEDING SEASON .... 4 



Protozoa — Co?lenterata — Nemertea, Etc. — Annelida — Arthropoda — 

 MoUusca — Eohinodermata — Cephaloohordata — Pisces — Amphibia — 

 Reptilia-^Aves — Mammalia — Associated Phenomena — Periodicity of 

 Breeding, Etc. 



CHAPTER II 



THE CESTKOIJS CYCLE IS THE MAMMALIA - 32 



Monotremata — Marsupialia — Rodentia — Ungulata — Cetaoea — Carnivora 

 — Inseotivora-^Cheiroptera — Primates. 



CHAPTER III 



THE CHANGES THAT OCCUR IN THE NON-PREGNANT UTERUS DURING THE 



(ESTROUS CYCLE - - 70 



The Cycle in Man — Monkeys — Lemurs — Inseotivores — Carnivores — 

 Rodents— Ungulates — Marsupials. 



CHAPTER IV 



CHANGES IN THE OVARY — OOGENESIS — GROWTH OE rOLLICLES — OVULATION — 

 EORMATION OF CORPORA LUTEA AND ATRETIC FOLLICLES — THE SIGNIFI- 

 CANCE or THE PROOiSTROUS CHANGES IN THE UTERUS • - - 109 



Development of Ovary and Oogenesis — Maturation and Ovulation — The 

 Formation of the Corpus Luteum — The Atretic Follicle — Super- 

 fcetation — Formation of Ova — The Significance of the trooestrous 

 Changes. 



CHAPTER V 



SPERMATOGENESIS — INSEMINATION 159 



Structure of Spermatozoa — Seminal Fluid — ^Movements of Spermatozoa — 

 Insemination. 



CHAPTER VI 



FERTILISATION 180 



The Oxidation Processes of the Ovum in Fertilisation and During Early 

 Development — The Hereditary Effects of Fertilisation — Telegony — 

 Oh Gametic Selection and the Conditions Favourable for the Occur- 

 rence of Fertilisation — Conjugation in the Protozoa — The Supposed 

 Chemotaotic Properties of iSpermatozoa and their Relation to the 

 Phenomena of Fertilisation — Child's Theory of the Life Cycle — 

 Artificial Aids to Fertilisation — Parthenogenesis, Natural and 

 Artificial. 



