ほんだはらノ生殖巣ノ發生

抄録

In Sargassum enerve and Sargassum Harneri, the initial cell of the onceptascle divides at first by a curved wall into two cells, the upper one being the so-called tongue cell. The lower cell repeats longitudinal division and forms the wall-cells lining the cavity of the conceptacle. Later the tongue cell becomes free from the wall of the conceptacle and is transferred to the mouth of the conceptacle to close up its opening.