The ultimate goal of The Conchological Albums – Terrestrial Molluscs is to figure the currently known world's biodiversity of land snails as completely as possible. Volume 1 of this series figures 637 shells that belong to 261 different species and 62 subspecies of the respective families. This series is not intended to be a revision of the respective gastropod families, but to figure their species and morphological plasticity. Each of the treated families is presented in a short introduction dealing with their peculiar facts.