. Conditions of life in the sea; a short account of quantitative marine biological research. Marine biology. CH. Ill] LIFE IN THE SEA 79 IQ ^Oq. Bottom di atonns â â¢'â â â "-'' ^Bacillana l^aradoDca Fig. 21. Plankton: diatoms. 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 Johnstone, James, 1870-1932. Cambridge, University press

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