This volume of Grzimek's Student Animal Life Resource: Crustaceans, Mollusks and Segmented Worms includes a pronunciation guide for scientific names, a glossary, an overview of birds, a list of species in the set by biome, a list of species by geographic location, and an index. The volume has nearly 200 full-color maps, photos, and illustrations to enliven the text, and sidebars provide additional facts and related information.