Phylum Mollusca is the second largest invertebrate group next to insects.Despite that molluscan population is declining globally and also in India. This book provides the taxonomic status of gastropods and bivalves inhabiting the land and freshwater habitats of Karnataka. In this book collective account on documented nonmarine molluscs of Karnataka is given that will help layman, students, stakeholders, conservationists to know about the diversity and to prioritize conservation action plans. The details on freshwater and land molluscs of Karnataka may be helpful for researchers to carry out future research on these ecosystems.