(partial) Form and function of the mantle cavity and associated organs. Feeding methods and adaptive radiation in the gastropoda. Feeding methods and evolution in the bivalvia. Adaptive radiation in the polysyringian bivalves. Digestion. Reproduction. Distribution of molluscs. The functions of the nervous system in the dibranchiate cephalopoda. Appendix A: The Four Minor Classes. Appendix B: The Three Major Classes.