The present book begins with the systematic survey of freshwater mollusks of India, including their ecology, distribution, the systematic survey of freshwater mollusks of India, including their ecology, distribution, values (food) and role in human welfare such as trematode infection in domestic cattle and man. The present form of this book includes a detailed account of the freshwater mollusks with key to the family, genera, and species besides geographical distribution and references. Attempts are not made to include all known synonyms, though in most cases these could be constructed from the cited references. Wherever, possible, locations of the type species are given.