This part is the first one of the Iconography on land snails illustrates the 54 species, subspecies and forms of the gigantic snails of the former “Lemurian continent”, belonging to the genera Acavus and Oligospira from Sri Lanka, Stylodonta from the Seychelles and Clavator, Paraclavator n. gen., Embetoniphanta n. gen., Helicophanta and Eurystyla from Madagascar. Besides the two new genera, three subgenera are described new to science. Full synonymy, data on type-material, geographical range and size are given for each taxon, as well as a full description of morphology, biology and habitat.
