. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. jO ' 0 ; [0 ' â 01 La. J [O ' 1^ fa ' «J. Fig. 2\^.~ rex (-'V')- Fig. 216.âPelagic Diatoms of the ribbon-type {-^?^). Chain of Navicula vanhoffeni, the cells con- nected by a band of mucilage ; b, part of a chain of Frasrilai-ia oceaiiica. the resistance of the water soon restores them to an
. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic. "Michael Sars" North Atlantic Deep-sea Expedition (1910); Oceanography; North Atlantic Ocean. jO ' 0 ; [0 ' â 01 La. J [O ' 1^ fa ' «J. Fig. 2\^.~ rex (-'V')- Fig. 216.âPelagic Diatoms of the ribbon-type {-^?^). Chain of Navicula vanhoffeni, the cells con- nected by a band of mucilage ; b, part of a chain of Frasrilai-ia oceaiiica. the resistance of the water soon restores them to an almost horizontal position, and they sink slowly in long spiral sweeps. (4) The Branching Type.âThe surface of the cell is enlarged by various kinds of hair-shaped or lamelliform outgrowths. To this type belongs the genus CJicetoceras with its numerous species (see Fig. 218).. j5^«fe«> Fig. 217.âPelagic Diatom of the hair-type, Rhizosolenia hebetata-semispina. a, Entire cell (^oo) ; b, end of a cell (^f«). Every cell has four long setiform outgrowths, and the cells are besides nearly always associated in chains, so that these setae radiate in every direction. When the chain is straight and stiff it is frequently furnished with special terminal setae, which are stiffer than the others, and act as a sort of steering apparatus. In addition to the actual outgrowths from the cell many diatoms can secrete long filaments of mucilage from special. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Murray, John, Sir, 1841-1914; Hjort, Johan, 1869-; Appellöf, Jakob Johan Adolf, 1857-; Gran, H. H. (Haakon Hasberg), 1870?-; Helland-Hansen, Bjørn, 1877-. London : Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
