Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 572
mother-cell; thusthe cyst, the membranous frond, or the frustule, performs the functionof a sporange. The Abbe was of opinion that these gonids orembryonal forms could have no traces of silex in their cell-walls,scarcely yet formed, until a few years ago,2 among the diatoms 1 This refers to those… … Arachnoldiscus Japonicus. CLASSIFICATION OF DIATOMS of a marine deposit of the Miocene period, lie met with a perfectfrustule of Coscinodiscus punctatus, which, between the two planesof the valves, and therefore within the cell, exhibited some roundmarks which admitted of no other interpretation…
Microscopy
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