Six rare trilobites from the Tremadocian Ceratopyge Limestone in Norway are described. The genus Pagometopus (close to Orometopus) and the species Pagometopus gibbus and Peltocare modestum are new. The terminology for the exoskeletal plates of the cephalon is revised. A chart shows the stratigraphic occurrence of the Tremaclocian trilobitcs recorded from Norway.