The second largest phylum in the animal kingdom, terrestrial mollusks are of vital importance to the earth? ecology. This richly illustrated and comprehensive guide'o land snails and slugs of the Pacific Northwest is a vital reference for nature enthusiasts and biologists. With information on the diversity, habitat requirements, range of shapes, sizes, and characteristics of the PNW mollusk fauna, Land Snails and Slugs of the Pacific Northwestincludes identification keys, species accounts, range maps, and photographs of more than one hundred and fifty species.