Eugene O’Meara and George S. West, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ It is a remarkable fact that though the generations of a diatom in the space of a few months far exceed in number the generation of man during the period usually assigned to the existence of the race, the fossil genera and species are in most respects to the most minute details identical with the numerous living representatives of their class. ”
Eugene O’Meara and George S. West, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ When in the process of ages, as it has often happened, the accumulated sediment has been hardened into solid rock, the siliceous frustules of the diatoms remain unaltered, and, if the rock be disintegrated by natural or artificial means, may be removed from the enveloping matrix and subjected to examination under the microscope. ”
Eugene O’Meara and George S. West, 1911 Encyclopædia Britannica, Volume 8… (1911)
“ The valves of some of the marine genera exhibit a beautiful areolated structure due to the presence of larger chambers within the siliceous cell-wall. Many diatoms possess thickenings of the cell-wall, visible in the valve view, in the centre of the valve and at each extremity. These thickenings are known as the nodules, and they are generally connected by a long median line, the raphe, which is a cleft in the siliceous valve, extending at least some part of its length. ”
