The structure & development of the mosses and ferns (Archegoniatae) . Fig. 5.—A-F, Development of the antheridium of K. glauca, seen in longitudinal section ; G, cross-section of a young antheridium of the same ; H, antheridium of R. hirta ; I, sperm cells of Figs. E, F, X 150; I, x6oo, the others X300. ordinary growth of the dorsal part of the thallus, and thespace about the archegonium is the direct equivalent of theordinary air-spaces. The first division in the primary antheridial cell is thesame as in the archegonium, but the later divisions differ muchand dp not show such absol
The structure & development of the mosses and ferns (Archegoniatae) . Fig. 5.—A-F, Development of the antheridium of K. glauca, seen in longitudinal section ; G, cross-section of a young antheridium of the same ; H, antheridium of R. hirta ; I, sperm cells of Figs. E, F, X 150; I, x6oo, the others X300. ordinary growth of the dorsal part of the thallus, and thespace about the archegonium is the direct equivalent of theordinary air-spaces. The first division in the primary antheridial cell is thesame as in the archegonium, but the later divisions differ muchand dp not show such absolute uniformity. The first divisionwall in the upper cell (Fig. 5, B) is always transverse, andthis is followed by a second similar wall, but the subsequentdivisions show considerable variation even in the same a varying number of transverse walls have been formed. II MUSCINE^—HEPATIC^—MARCHANTIACE^ 33 in most cases the next divisions, which are formed only in themiddle segments, are vertical, and divide the segments intoquadrants of a circle whe
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Keywords: ., bookcentury1800, bookdecade1890, bookidstructuredev, bookyear1895
