(Backcover text) The Macdonald Encyclopedia of Shells is a comprehensive guide to over 350 varieties of shell and the creatures that inhabit them. Each entry lists the scientific name, the common name and family name of the mollusk and gives a full description of appearance and structure. internal anatomy, natural habitat and geographic distribution. The text is supported by full colour photographs, a key for size, and diagrams indicating ecological environment and geographic occurrence. With detailed advice on collecting and preserving, as well as a classification table and index, The Macdonald Encyclopedia of Shells is the essential guide for beginners and experts alike.