6 CONTENTS 



Page 



VI. ARTHROPODS 99 



1. Crustaceans 1*0 



2. Aquatic Insects 105 



3. Tenestiial Insects ' „.......:.119 



4. Ariicluioids. Tardigrades, Cliilopods and 



Dii)loj)ods 127 



5. Parasitic Arthropods 129 



SUMMARY OF PART I... .:..::..: ...■ 132 



PART II 



THE ANAEROBIC METABOLISM OF 

 INVERTEBRATES 



CHAPTER I 



PARTIAL TRATs^^ITION FROM AEROP,IC TO 

 ANAEROBIC METABOLISM 137 



1. Inflnence of Lowered Oxygen Tension on Oxygen 



Consumption 139 



2. Evidence of Partial Transition to Anaerobic Metab- 



olism 147 



CHAPTER II 

 AEROBIC FERMENTATIONS : ....156 



1. Occurrence of Aerobic Fermentations 158 



2. The Significance of Aerobic Fermentations and 



Their Relationships with Other Tvpes of Oxida- 

 tions ' 162 



CHAPTER III 

 THE SOURCES OF ENERGY IN ANAEROBIOSIS 171 



1. Carbohydrates 172 



2. Fats 192 



3. Proteins 194 



CHAPTER IV 

 ANAEROBIC PROCESSES ; 198 



1. Carbohydrates 198 



2. Fats 218 



3. Proteins : 219 



4. Anaerobic Gas Metabolism 223 



5. Enzvmes 229 



