CONTENTS 
INTRODUCTION 
I. Tse CeLtt THEORY ; 
Il. Tue RecaPiTuLATION THEORY 
Ill. Tue PuystotoGy or DrvELOPMENT coh ale: 
IV. Empryonic PrrmorpiA AND THE LAW OF Gunntic Reeate 
TION Ve 
V. GENERAL Gunmionnes OF Cae CELLS 
The Spermatozoon 
The Ovum 
Comparison of the Ger m- tells 
VI. PowuaRiITy:AND ORGANIZATION OF THE OVUM 
PARE al 
PAGE 
THE EARLY DEVELOPMENT TO THE END OF THE 
TER DAY. 
CHAPTER I. THE EGG 
Chemical Composition oj the Ter n’s ne 
Formation of the Egg 
Abnormal Eggs 
Ovogenests 
CHAPTER II. THE DEVELOPMENT PRIOR TO LAYING 
I. MATURATION 
II. FERTILIZATION . : 
Ill. CLEAVAGE OF THE OvUM 
The Hen’s Egg 
The Pigeon’s Egg abit te A te ee 
IV. ORIGIN OF THE PERIBLASTIC oer EI, soneloton OF THE 
GERM-WALL 
V. ORIGIN OF THE ECTODERM AND iinaeouen 
CHAPTER III. OUTLINE OF DEVELOPMENT, ORIENTA-— 
TION, CHRONOLOGY 
Orientation : 
Chronology (¢ Tasereeanien of Senge) 
Tables of the Development of the Chick 
. 
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