This paper describes four new species, namely Dicharax caudapiscis n. sp., Dicharax stuparum n. sp. (both family Alycaeidae Blanford, 1864), Pseudopomatias caligosus n. sp. (family Pupinidae L. Pfeiffer, 1853) and Arinia (Notharinia) boucheti Páll-Gergely, n. sp. (family Diplommatinidae Benson, 1849). The first three were recently collected in northern Thailand, whereas the latter one was collected in Laos by Edmond Saurin, and later also found in the collection of the Muséum national d’Histoire naturelle, Paris.
Prosobranchia, operculate land snails, new species.