This paper includes new data on Bythotiaridae (Anthomedusae), Protiaropsis pedunculata Xu, Huang & Guo, sp. nov. and P. tetranema Xu, Huang & Wang, sp. nov. are described. An additional two genera and species: Eumedusa sp. and Sibogita geometrica Mass, 1905 are recorded from Chinese waters for the first time. The species Bythotiara depressa Naumov, 1960 is redescribed and its relationship to Protiaropsis anonyma (Maas, 1905) is discussed. Other data are briefly summarized to the list of species presented on the family Bythotiaridae in South China Sea. The type specimens were deposited at the Third Institute of Oceanography, State Oceanic Administration.