CONTENTS 



.. PAGK 



INTRODUCTION 1 



CHAPTER I 



THE BREEDING SEASON 4 



Protozoa Ccelenterata Nemertea, Etc. Annelida Arthropoda 

 Mollusca Echinodermata Cephalochordata Pisces Amphibia 

 Reptilia Aves Mammalia Associated Phenomena Periodicity of 

 Breeding, Etc. 



CHAPTER II 



THE (ESTROUS CYCLE IN THE MAMMALIA - - 32 



Monotrenmta Marsupialia Rodentia Ungulata Cetacea Garni vora 

 Insectivora Cheiroptera Primates. 



CHAPTER III 



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



(ESTROUS CYCLE 70 



The Cycle in Man Monkeys Lemurs Insectivores Carnivores 

 Rodents Ungulates Marsupials. 



CHAPTER IV 



CHANGES IN THE OVARY OOGENESIS GROWTH OF FOLLICLES OVULATIOTJtT- 

 FORMATION OF CORPORA LUTEA AND ATRETIC FOLLICLES THE SIGNIFI- 

 CANCE OF 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 Prooestrous 

 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 

 On Gametic Selection and the Conditions Favourable for the Occur- 

 rence of Fertilisation Conjugation in the Protozoa The Supposed 

 Chemotactic Properties of Spermatozoa and their Relation to the 

 Phenomena of Fertilisation Child's Theory of the Life Cycle 

 Artificial Aids to Fertilisation Parthenogenesis, Natural and 

 Artificial. 



