Contributing Authors. Preface. 1. Systematics and Geographic Distribution of Mytilus (E.M. Gosling). Introduction. Taxonomy of Mytilus . Geographic Distribution of Mytilus . Acknowledgements. References. 2. The Evolution and Success of the Heteromyarian Form in the Mytiloida (B. Morton). Introduction. The Primitive Bivalve. Functional Morphology of Mytilus . The Evolution of the Mytiloida. Discussion. References. 3. Ecology and Morphology of Larval and Early Postlarval Mussels (R.A. Lutz and M.J. Kennish). Introduction. Fertilization, Embryogenesis and Larval Development. Settlement and Metamorphosis. Larval Dispersal and Recruitment. Larval and Postlarval Shell Morphology. Identification of Larval and Early Postlarval Bivalves. Acknowledgement. References. 4. Population and Community Ecology of Mytilus (R. Seed and T.H. Suchanek). Introduction. Distributional and Zonational Patterns. Reproduction. Settlement and Recruitment. Somatic Growth. Production. Mortality. The Mytilus Bed Community. Disturbance and Recovery of Mytilus Beds. References. 5. Physiological Interrelations, and the Regulation of Production (A.J.S. Hawkins and B.L. Bayne). Introduction. Physiology of Production. Regulation of Production. Synopsis. References. 6. Cellular Biochemistry and Endocrinology (A. de Zwaan and M. Mathieu). Cellular Energy Metabolism in the Mytilidae: An Overview. Aerobic Metabolism at the Organism, the Tissue and Subcellular Level. Anaerobic Metabolism. The Pentose Phosphate Pathway. Metabolic Rate. Lipid Metabolism. Metabolism and Gametogenesis: Neuroendocrine Regulation. Acknowledgements. References. 7. Genetics of Mytilus (E.M. Gosling). Introduction. Population Genetics. Cytogenetics. Genetics and Mariculture. Acknowledgements. References. 8. Mussels and Environmental contaminants: Bioaccumulation and Physiological Aspects (J.Widdows and P. Donkin). Introduction. 'Mussel Watch' Concept. Advantages of Using Mussels for Monitoring. Environmental Contamination. Factors Affecting Bioaccumulation of Chemical Contaminants in Mussels. Factors Affecting Bioaccumulation: Implications For Monitoring Programmes. Role of Combined Measurement of Physiological Energetics and Tissue Residue Chemistry in Ecotoxicology. Conclusions. References. 9. Mussels and Environmental Contaminants: Molecular and Cellular Aspects (D.R. Livingstone and R.K. Pipe). Introduction. Molecular Aspects. Cellular Aspects. Pollution Monitoring. Acknowledgements. References. 10. Mussel Cultivation (R.W. Hickman). Introduction. Aquaculture Characteristics of Mussels. Methods of Cultivation. Farm Management. Mussel Culture Productivity and Economics. Constraints on Mussel Cultivation. The Future of Mussel Farming. References. 11. Mussels and Public Health (S.E. Shumway). Introduction. Diseases Transmitted by Mussels. Depuration. Monitoring and Regulations. Conclusions. Acknowledgements. References. 12. Diseases and Parasites of Mussels (S.M. Bower). Introduction. Viruses. Bacteria.