This monograph on pest slugs and snails reviews the problems they create as plant pests in horticulture, agriculture, and forestry, and also as intermediate hosts for parasitic trematodes, cestodes and nematodes which cause worm diseases in man and domestic animals. Here only those vector snails which inhabit flooded or constantly irrigated fields, water storage reservoirs or farm ponds are considered. Reference is also made to the role of pulmonates as carriers of the agents of disease - viruses, bacteria, fungi and worms' eggs, which may be transmitted to man with inadequately cleaned...