The malacofauna of the younger and older loess of the Przemyśl region, SE Poland

Differences between molluscan assemblages occurring in loess series of the Younger . Pleistocene bear no distinct relation to the age of the sediments. The assemblages recorded from the last two cold periods (Saalian, Vistulian) comprise the same species, differences in the species composition among the faunae of various localities being controlled by enviromnental factors. This conclusion stems from the studies carried out by V. Lozek in Czechoslovakia, J. J. Puissegur in France, M. Wagner in Hungary, as well as from those carried out in Poland, a.o. in the profiles at Odon6w and in the Przemy~l region.