其他摘要：In this paper, we present a classification of diatom taxa collected from the Memenai-numa, or Kouhone-numa, (“numa” = marshland), which is one of the pools located around the mouth of the Yuchikawa River, in Wakkanai, Hokkaido. The classification makes use of light and scanning electron microscopy. Little is known about the plankton phase in Memenai-numa beyond what is reported in Tanaka 2003 and 2004. This paper follows those reports. The total numbers of forms identified this time come to 16 genera and 38 taxa. The genus having the most taxa is Gomphonema followed by Eunotia and Nitzschia. The dominant taxum is Staurosira venter which accounts for 80.5% of the whole. Five electron microscope figures are attached.
