The present paper is a continuation of the report on the marine green algae from the Xisha Islands.Six species of Halimeda are reported, among them five species are new additions to the marine flora of Xisha Islands, inc1uding one new species, name1y, Halimeda xishaensis The other four species are Halimeda discoidea Decaisne， H. macroloba Decaisne，H. taenicola Taylor and H. velasquezii Taylor, the 1ast two species are recorded for the first time from the China coast. The specimens are deposited in the harbarium of the Institute of Oceanology, Academia Sinica, at Qingdao (Tsingtao).