Our investigations on the marine flora of the Xisha Islands(Guangdong Province,China) have shown the richness of the chlorophyeeaceous flora in these South China Sea Coral Islands.So far, 26 species have already been reported (Tseng and Chang,1962;Fan,1963;Tseng and Dong,1975 and Chang,Xia and Xia, 1975),among which 8 species were newly described species, showing a rather high percentage of endemic elements. In the present paper, fourteen more species of marine green algae are added to the Xisha flora. Seven species are new additions to the marine flora of China, including one new species,namely, Chlorodesmis sinensis. The other six species are Cauperpa brachypus Harv, Tydemania expeditionis Weber-van Bosse. Codium ovale Zan., Halimeda micronesiea Yam, Acetabularia clavata Yam. and A. tsengiana Egerod.These species recorded for the Chinese marine flora for the first time are fully deseribed on the basis of our own materials, to facilitate better understanding of these seaweeds.