The xiphosurans Bellinurus lunatus (Martin, 1809) and Euproops rotundatus (Prestwich, 1840) are described from sideritic concretions hosted by the Orzesze Beds (Westphalian B) in. the Polish region of the Upper Silesia Coal Basin. Associated flora and fauna include terrestrial plant remains and a single palaeodictyopteran insect nymph. As no marine influences are known in this area since the Namurian A, these xiphosurans were probably fresh-water organisms.