Symposium organized in cooperation with the Malacological Society of London. U.S. ed. published by the Academic Press, New York. Includes bibliographical references.

The structure of the brain of Helix aspersa. Electron microscope localization of cholinesterase and amines / G. Newman, G.A. Kerkut and R.J. Walker -- The localization of dopamine and 5-hydroxytryptamine in neurones of Helix aspersa / C.B. Sedden, R.J. Walker and G.A. Kerkut -- The pharmacology of the neurones of Helix aspersa / R.J. Walker, A. Hedges and G.N. Woodruff -- Shell regeneration in Helix pomatia with special reference to the elementary calcifying particles / Anna Abolins-Krogis -- The mechanism of calcification in the molluscan shell / Peter S.B. Digby -- A review of the bivalved gastropods and a discussion of evolution within the Sacoglossa / E. Alison Kay -- The biology of interstitial Mollusca / Bertil Swedmark -- The feeding mechanism and behaviour of the opisthobranch Melibe leonina / Anne Hurst -- The burrowing activities of bivalves / E.R. Trueman -- Aspects of excretion in the molluscs / W.T.W. Potts -- The fine structure of cardiac and other molluscan muscle / R.H. Nisbet and Jenifer M. Plummer -- Gametogenesis and oviposition in Lymnaea stagnalis as influenced by {gamma}-irradiation and hunger / J. Joosse, Maria H. Boer and C.J. Cornelisse -- Electron microscopy study of neurosecretory organs in the pond snail Lymnaea stagnalis / H.H. Boer, Elisabeth Douma and Jenneke M.A. Koksma -- Spontaneous activity and tactile pathways in the central nervous system of Lymnaea stagnalis / T.A. de Vlieger -- Sorting phenomena during the transport of shell valves on sandy beaches; studies with the use of artificial valves / J. Lever and R. Thijssen -- Britain's fauna of land Mollusca and its relation to the post-glacial thermal optimum / M.P. Kerney -- Changes in the composition of land molluscan populations in north Wiltshire during the last 5000 years / J.G. Evans -- Habitat distribution of Solomon Island Mollusca / John F. Peake.