The present paper deals with 4 species of parasitic red algae belonging to 2 genera and 2 ordres. Of these, one is new and three are recorded for the first time from Chinese waters. The spermatangial conceptacles of Gracilariophila infidelis (Weber-van Bosse) Weber-van Bosse and detailed structure of cystocarp of G. deformans Weber-van Bosse are newly described. The specimens studied, including the type specimens, are all deposited in the herbarium of the Institute of Oceanology, Academia Sìnica at Qingdao.