Since their origin in the Early Cambrian, the bivalve molluscs have evolved a remarkable variety of forms that reflect their diverse habits through the Phanerozoic Eon. The thirty papers in this volume represent the proceedings of an international symposium on the paleobiology and evolution of the bivalves held at the Royal Tyrrell Museum of Paleontology, Drumheller, Canada, 29 September to 2 October 1995. An international group of authors, representing a dozen countries, draw on diverse aspects of both fossil and living bivalves, including their form, functional morphology, morphogenesis, taphonomy, shell microstructure, cladistic relationships, biostratigraphic distributions, and molecular sequences. The book presents a broad spectrum of current research on fossil and living bivavles.