<正> Marine plankton research, as well as other branches of science, has made great progress after the liberation which is rendered possible through the great attention and support given by the Communist Party of China and the Government to scientific research. A considerable amount of plankton samples and data have been accumulated during the past ten years by surveys of fishing grounds, bays and coastal waters, the results of which have been partly published in a number of papers and reports. Since autumn of last year, a very extensive oceanographic survey is being carried out along the entire coast of China. The outcome of this large-scale