Approximately 247 species and many subspecies and forms are discussed and illustrated on 107 full color full page photo plates. Species information includes synonomy, range, habitat, description, shell characteristics, animal and radula characteristics & remarks. The book features a new systematic arrangement of the family, which is compared with earlier arrangements. An extensive bibliography, notes on the systematic arrangement and 410 black/white drawings & photos are included.

Book price € 100,00 + € 7,00 for the delivery at the bookstore.

Edition: 1992