Carpenter, William Benjamin, 1813-1885 · Philadelphia : Blakiston · leaf 472
epidermic layer of cells, thickened at thetop to form the operculum o; p, two intermediate layers, fromwhich the peristome will be formed; s, inner layer of cellsforming the wall of the loculus. Volvox (§ 242). The protoplasm first detaches itself from contactwith the cell-wall, and collects itself… … Antheridia and Antherozoids of Polytrichum commune:—A,group of antheridia, mingled with hairs and sterile filaments(paraphyses): of the three antheridia, the central one is inthe act of discharging its contents ; that on the left is not yetmature ; while that on the right has already emptied…
Microscopy · Biology
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