Abstract: In 1986, the author discovered fossils of metazoan medusinites in a shale bed of the Wangjiatan Shale Member of the middle Xingmincun Formation of the Jinxian Group in Qipanmu, Dalian, as well as fossils of medusinites, worms, dubious small-shelled metazoans and macroscopic algae in a shale bed of the Getun Formation in the Beishan Mountain, Jinzhou. This enriches the content of the Sinian paleontology of China and furnishes paleontological evidence for the definition of the Sinian-Cambrian boundary in southern Liaoning.