From 1866 to 1983, about 28 species of the articulated coralline algae were reported from China (see the list). Most of them, in general, were published in list without detailed descriptions morphologically or anatomically, and some only with a few localities indicated. Thus, it would be rather difficult to make a correct identification of certain species, and before the specimens from the similar localities were obtained or the original ones were examined, some? records could hardly be accepted with certainty. In this paper. 5 genera and 8 species belonging to Corallinoideae (Aresch,) Fosl. (Adey and Johansen, 1972; Johansen, 1976) with their anatomical details and concrete localities in China are described. The specimens used for this study were collected by members of the Institute of Oceanology, Academia Sinica and the present authors during 1949-1984, and by Prof. C. K. Tseng during 1933一1941. Among them. Cheilosporum jungermannioides Rupr. was already recorded from Taiwan Province (Shen and Fan, 1950), Corallina sessilis Yendo and Jania ungulata Yendo f. brevior Yendo from Hong Kong, (Lee, 1965), Jania rubens (L.) Lamx. is new to China; other 4 species, namely, Bossiella cretacea (P. et R.) Johansen, Jania crassa Lamx., Marginisporum crassissimum (Yendo) Ganesan, and M. aberrans (Yendo) Johansen et Chihara were reported by the present authors in “ Common Seaweeds of China" for the Chinese marine flora for the first time. We are much interested in the Genus Marginisporum which was originally regarded as being endemic to Japan, but recently two species of the genus, i.e., M. crassissimum (Yendo) Ganesan and M. aberrans (Yendo) Johansen et Chihara, were also found of frequent occurrence on the coasts of Zhejiang or Fujian Provinces, China. As pointed out by Johansen (1969), the marginal and lateral conceptacles with essentially straight medullary filaments characterized by Marginisporum, are also present in the Chinese specimens. Even though, the conceptacle types in Marginisporum, whether marginal or lateral, are not always very clear. Sometimes, margina1. conceptac1es appearing axial, cortical ones appearing marginal after maturity (Johansen, 1981). Based upon Yendo (1902a)， Segawa (194la, 194lb) and our anatomic and distributional investigations on the above two species of Marginisporum from Japan and China, we think it would. be more reasonable to combine the closely related species Amphiroa aberrans Yendo together with A. crassissima Yendo and A. declinata Yendo into the genus. Marginisporum.