The Terrestrial Mollusc Key was specifically designed to assist in the identification of adult terrestrial slugs and snails of agricultural importance. The key also includes species of quarantine significance as well as invasive and contaminant mollusc species commonly intercepted at U.S. ports of entry. This key is designed for federal, state and other agencies or organizations within the U.S. that are concerned with the detection and identification of molluscs of significance. This key include