Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 581
ofbinary division of the frustule, increases in breadth, while the frus-tules themselves remain coherent, so that a beautiful fan-like arrange-ment is produced (fig. 401). A splitting away of a few frustulesseems occasionally to take place, from one side or the other, beforethe elongation of the… … entirestalk. length of the foot-This beautiful plant is marine, and is attachedand zoo- to seaweedsphytes. In the next family, thatof Fragilariece, the frus-tules are of the samebreadth at each end, sothat if they unite into afilament they form astraight band. In somegenera they are smooth,…
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