This study is a part of the seashore investigation in Fujian Province during 1961 to 1961. The method used for dividing tidal zones and strata follows the general principle developed by Vaillant. In each zone or stratum sampling was made at least twice in quadrates of l/16m2.150 species of algae have been identified, most of them belonging to subtropical species. However, warm-temperate species also constitute a relative large portion and play an important role in the community structure, showing the effect...