The ultimate goal of this project "The Conchological Albums - Terrestrial Molluscs" is to figure world's biodiversity of land snails as complete as possible. Volume 13 of this series figures 709 shells of the Clausiliidae (subfamily Alopiinae) that belong to 220 different species and 141 subspecies. Treated genera: Agathylla, Albinaria, Alopia, Barcania, Carinigera, Charpentieria, Cochlodina, Cristataria, Heriella, Inchoatia, Isabellaria, Lampedusa, Leucostgma, Macedonica, Mauritanica, Tirolica