The soundings of the sea-bottoms of Japan by Mr. H. Nzino et al. enabled the authors to confirm the presence of fairly rich algal flora down to a depth of 130 meters, though one deeper than 80 meters bad not been put on record hitherto. Remarkably enough, Ecklonia stolonifera OKAM. was found in a flourishing condition at a depth of 199 meters. This depth is perhaps the deepest ever known of the marine algae of the world.
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