The following 11 Myxomycete species new to Finland are described: Clastoderma debaryanum, Comatricha longipila, Cribraria atrofusca, C. mirabilis, C. pertenuis, C. stellifera, Licea eleanorae, Physarum braunianum, P. flavicomum, P. mutabile and Stemonitis marjana. Cribraria pertenuis, C. stellifera, C. longipila and L. eleanorae were collected from moist chamber cultures. The rest of the specimens were collected from field. The known biota of Myxomycetes in Finland now includes altogether 225 species.