Marine algae from the Xisha Islands, Guangdong Province, China collected by the members of the Institute of Oceanology(1957, 1958, 1975 and 1976)have been studied and some results published in a series of papers commencing in 1975. During the course of the study eleven species belonging to six sections and two subgenus are found, of which five species, namely Laurencia decumbens Kuetz. L. galtsoffi Howe, L. mariannensis Yam L. pinnata Yam, and L. cartilaginea Yam. are newly recorded here for China. Laurencia articulata Tseng from Hong Kong is founded on sterile specimens. According to Tseng(1943), it belonged to Section Forsterianae. On re-examining it, we found that in its longitudinal section of the stichidium, the sporangia are arranged at right angles to the central axis (fig. 9).According to Saito (1967), this species ought to belong to the Subgenus II Chondrophycus and Section Chondrophycus. Yamada (1931) regarded lenticular thickenings as a diagnostic character at the sectional level and distinguished the Section Forsterianae from the Section Laurencia of the Subgenus I Laurencia on the basis of the presence of lenticular thickening in the walls of the medulla. We are of the opinion that this characteristic should also have section bearing in the Subgenus II Chondrophycus and, therefore propose to establish a new section for L. articulata and L. verticillata as follows: