TABLE OF CONTENTS 



CHAPTER PAGE 



I. Problems and Material i 



II. Certain General Characteristics of Developmental Patterns . i6 



III. Concerning Methods of Physiological Analysis 58 



IV. Physiological Characteristics of Axiate Patterns 86 



V. Differential Modification of Development: Coelenterates and 



Flatworms 166 



VI. Differential Modification of Development: Echinoderms . 197 



VII. Differential Modification of Development: Other Animal 



Groups 247 



\'III. Gradients and Fields: Determination, Differentiation, and De- 

 differentiation 272 



IX. Physiological Integration: Dominance and Physiological Isola- 

 tion 304 



X. Physiological Dominance and Organization in Reconstitution . 332 



XI. Reconstitutional Patterns in Relation to Experimental Condi- 

 tions 359 



XII. Inductors and So-called "Organizers" in Embryonic Develop- 

 ment 435 



XIII. Certain Embryonic Reconstitutions in Relation to Pre-existing 

 Pattern 5^4 



XIV. Cleavage and Developmental Pattern 544 



XV. Questions of Origin of Certain Agamic Patterns under Natural 



Conditions 599 



XVI. Origin AND Nature OF Embryonic Patterns: The Problems and the 



Evidence 644 



XVII. Physiological Integration, Differentiation, and Growth in the 



Progress of Development 7°^ 



Appendixes 729 



Bibliography 75° 



Index 8°i 



53668 



