From a boring near Flushing on the isle of Waloheren in the province of Zee- land the author describes several species of terrestrial and freshwatermolluscs from a depth of 12,40 – 14,50 meters below surface. From the thanatocoenosis an age could be determined of younger Plistocene (Weichselien). From a depth of 14,50 – 15,50 meters below surface some marine species are mentioned together with land- and freshwaterspecies, the age of which is Eemien.