X CONTENTS 



Section 4-4. Heat Production and Calorific Quotients of Echinoderm page 649 

 Embryos 



4-5. Respiration of Annelid, Nematode, Rotifer, and Mollusc 659 

 Embryos 



46. Respiration of Fish Embryos 665 



47. , Respiration of Amphibian Embryos 67 1 

 4-8. Heat-production of Amphibian Embryos 682 

 49. Respiration of Insect Embryos 687 

 4- 1 o. Respiration of Reptile Embryos 692 

 4-11. Respiration of Avian Embryos in General 693 

 4-12. Heat-production of Avian Embryos 7^4 

 4-13. Later Work on the Chick's Respiratory Exchange 7^8 

 4- 1 4. The Air-space and the Shell 7 1 9 

 4-15. Respiration of Mammalian Embryos 726 

 4" 1 6. Heat-production of Mammalian Embryos 732 

 4-17. Anaerobiosis in Embryonic Life 742 



^, 4" 1 8. Metabolic Rate in Embryonic Life 746 



4-19. Respiratory Intensity of Embryonic Cells fn wVro 755 



4-20. Embryonic Tissue-respiration and Glycolysis 758 



4-21. The Genesis of Heat Regulation 772 



4-22. Light-production in Embryonic Life 776 



Section 5. Biophysical Phenomena in Ontogenesis 777 



5-1. The Osmotic Pressure of Amphibian Eggs 777 



5-2. The Genesis of Volume Regulation , 786 



53. The Osmotic Pressure of Aquatic Arthropod Eggs 790 



54. The Osmotic Pressure of Fish Eggs 793 



5-5. Osmotic Pressure and Electrical Conductivity in Worm and 799 

 Echinoderm Eggs 



5-6. The Osmotic Pressure of Terrestrial Eggs 8l2 



5-7. Specific Gravity 820 



5-8. Potential Differences, Electrical Resistance, Blaze Currents 825 

 and Cataphoresis 



5-9. Refractive Index, Surface Tension and Viscosity 833 



Section 6. General Metabolism of the Embryo 839 



6-1. The j&H of Aquatic Eggs 839 



6-2. The j&H of Terrestrial Eggs 855 



63. rH in Embryonic Life 865 



6-4. Water-metabolism of the Avian Egg 870 



