Approaches to the Study of Plant Competition＆by JOHN L．HARPER 1
Definition of Competition among Animals＆by A．MILNE 40
The Role of Physiology in Adaptation and Competition between Animals＆by J．W．L．BEAMENT 62
Intraspecific Competition in Sedentary Marine Animals＆by E．W．KNIGHT-JONES and J．MOYSE 72
Competition among Insect Parasitoids＆by GEORGE SALT 96
Adaptations of Some Aquatic Animals to Low Oxygen Levels and to Anaerobic Conditions＆by L．C．BEADLE 120
The Functional Significance of Aerenchyma in Plants＆by W．T．WILLIAMS and D．A．BARBER 132
Competition between Trees and Herbs for Nutrient Elements in Calcareous Soil＆by CARSTEN OLSEN 145
Competition and Mechanisms of Osmotic Adaptation＆by P．C．CROGHAN 156
Aspects of Stress Phenomena＆by KENNETH A．MUNDAY 168
On the Significance of External Metabolites in Ecology＆by C．E．LUCAS 190
Growth-Controlling Exudates of Tadpoles＆by S．MERYL ROSE and FLORENCE C．ROSE 207
The Role of Toxic Substances in the Interrelationships between Higher Plants＆by G．GRUMMER 219
New Physiological and Biological Aspects in the Interrelationships between Higher Plants＆by the late A．G．WINTER 229
Competitive Ability in Plants:Its Inheritance and Some Related Problems＆by KAN-ICHI SAKAI 245
Competition and Co-operation＆by KENNETH MATHER 264
Competition for Light in Crops and Pastures＆by C．M．DONALD 282
Space Relationships within Populations of One or More Species＆by C．T．DE WIT 314
The Nature and Analysis of Competition between Plants of Different Species＆by F．L．MILTHORPE 330
Author index 357
Subject index 363