CONTENTS 



PAGE 



I. Introductory Remarks ... 1 



II. Some Remarks on the Morphology of Development - 1? 



III. Fertilization and Oxidation 25 



IV. Hydrolytic Processes in the Germination of Oil- 



containing Seeds - 39 



V. Some Earlier Observations on Natural Partheno- 

 genesis in Insects - 43 



VI. On the History of the Earlier Experiments on Artificial 



Parthenogenesis - 47 



VII. The First Experiments upon the Osmotic Activa- 

 tion of the Unfertilized Egg of the Sea-Urchin 

 (Arbacia) 57 



VIII. The Improved Method of Artificial Parthenogenesis 



in the Sea-Urchin Egg - 65 



IX. The Effect of Artificial Membrane Formation on the 



Egg - 73 



X. Further Examples of the Prolongation of the Life of 



the Egg by Lack of Oxygen - 85 



XI. Further Experiments on the Action of the Hypertonic 



Solution after Membrane Formation 95 



I 



XII. The Effect of the Agencies of Artificial Partheno- 

 genesis upon the Oxidations. The Cytological 

 Changes in the Parthenogenetic Egg - - 113 



XIII. The Relative Physiological Efficiency of Various Isos- 



motic Solutions - 127 



XIV. Chemical Constitution and Relative Physiological 



Efficiency of Acids - 133 



XV. The Activation of the Unfertilized Egg by Bases - 147 



ix 



