CONTENTS 



PASE 

 rNTEODTJOTIOlI . 1 



CHAPTER I 



THE BBEEDING SEASON ......... 4 



Protozoa — Coelenterata — ^Nemertea, Ac. — Annelida — ^Arthropoda 

 — MoUusca — Echinodermata — Cephaloohordata — Pisces — ■ 

 Amphibia — Reptilia — Aves — Mammalia — Periodicity of 

 Breeding, &c. 



CHAPTER II 



THE OSSTEOUS CYCLE IN THE MAMMALIA ..... 35 



Monotremata — ^Marsupialia — ^Rodentia — Ungulate — Cetacea — 

 Carnivora — Insectivora — Cheiroptera — ^Primates. 



CHAPTER III 



THE CHANGES THAT 0C0T7E IN THE NON-PBEGNANT UTEKUS DUEING 



THE a5STR:,US CYCLE ........ 75 



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

 — Ungulates. 



CHAPTER IV 



CHANGES IN THE OVARY — OOGENESIS GROWTH CIT FOLLICLES 



OVULATION- — FOEMATION OF CORPtRA LTTTEA AND ATRETIC 



FOLLICLES THE SIGNIFICANCE OF THE PROCBSTEOUS CHANGES 



IN THE UTERUS ....... 113 



Dev lopment of Ovary and Oogenesis — Maturation and Ovulation 

 — ^The Formation of the Corpus Luteum — The Atretic FoUicle 

 — Superfcetation — ^Formation of Ova — ^The Significance of the 

 Prooestrous Changes. 



CHAPTER V 



SPERMATOGENESIS — INSEMINATION ... ... 165 



Structure of Spermatozoa — Seminal Fluid — Movements of Sper- 

 matozoa — Insemination. 



