. 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. Oceanography. mn »V :'fi % r\ ====<!lfe R^. F= b Fig. 214.—Auxospore-formation OF Thalassiosira gravida. a, Showing in the centre a newly-formed auxospore, the old cell-walls still lying outside (-y-) ; b, showing on the left a cell before auxospore-formation, succeeded by an auxospore during its first cell-division, the chain of five cells having originated from an auxospore (-f-). this kind have a highly
. 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. Oceanography. mn »V :'fi % r\ ====<!lfe R^. F= b Fig. 214.—Auxospore-formation OF Thalassiosira gravida. a, Showing in the centre a newly-formed auxospore, the old cell-walls still lying outside (-y-) ; b, showing on the left a cell before auxospore-formation, succeeded by an auxospore during its first cell-division, the chain of five cells having originated from an auxospore (-f-). this kind have a highly organised locomotion apparatus, which is differently constructed in the different genera, such as Navicula and Nitzschia. Attached forms show more variation. Symmetry with them depends upon the mode of attachment. Licmophora and Gomphonema are fastened at one end to a gelatine-like stalk, and their cells are wedge-shaped, narrow at the bottom and widening out towards the top. Others, like Epithernia, are convex on the one side and straight on the other, the straight side being the one by which they are attached. And there are others again that consist of more or less highly organised and often ramifying colonies, composed of series of cells, or sheaths of mucilage, within which the cells are able to move past one 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-. London Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1912
