. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Halimeda (Blake). To the Phaeophyceae belong the Phaeosporse, theDictyotaceae, and the Fucacese. The Phaeosporse haveconjugating and non-conjugating motile spores, allmoving about by the aid of two cilia. To this groupbelong the greater number of brown algae : the slenderfilamentous Ectocarpus family, of which many members BROWN ALG^ 139 lead a parasitic life on other algae ; and the big Lamm-arise, the crust-forming Ralfsiae so easily overlooked ;Asperococcus, with its saclike frond
. Science of the sea. An elementary handbook of practical oceanography for travellers, sailors, and yachtsmen. Halimeda (Blake). To the Phaeophyceae belong the Phaeosporse, theDictyotaceae, and the Fucacese. The Phaeosporse haveconjugating and non-conjugating motile spores, allmoving about by the aid of two cilia. To this groupbelong the greater number of brown algae : the slenderfilamentous Ectocarpus family, of which many members BROWN ALG^ 139 lead a parasitic life on other algae ; and the big Lamm-arise, the crust-forming Ralfsiae so easily overlooked ;Asperococcus, with its saclike frond ; and Cutlena,with its two alternating generations, formerly describedas distinct genera under the names of Aglaozoma andCutleria—they all, and as many more, belong to Fig. 52.—Udothea ( Blake A few details may be given of the family of the Lamin-ariaceae, or Kelps, this family being chosen because itslarge members play such an important part in thephysiognomy of several coasts. When young they consist of a hold-fast, a stipe, anda linear or expanded blade, which undergoes manychanges in the different genera. They live in the 140 THE PLANTS
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectocean, bookyear1912
