. The structure and development of mosses and ferns (Archegoniatae). er cells, all, how^ever, unmistakably the product of a singlecell, and if a comparison is to be made with the antheridium ofany other Liverwort, the antheridium in the latter is homol-ogous, not with the single one of Anthoceros, but with thewhole group, plus the two-layered upper wall of the cavity inwhich they lie. The first divisions in the antheridium are the same as thosein the original cell, i.e., the young antheridium is divided longi-tudinally by two intersecting walls, and the separation of the9 I30 MOSSES AND FERNS
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. The structure and development of mosses and ferns (Archegoniatae). er cells, all, how^ever, unmistakably the product of a singlecell, and if a comparison is to be made with the antheridium ofany other Liverwort, the antheridium in the latter is homol-ogous, not with the single one of Anthoceros, but with thewhole group, plus the two-layered upper wall of the cavity inwhich they lie. The first divisions in the antheridium are the same as thosein the original cell, i.e., the young antheridium is divided longi-tudinally by two intersecting walls, and the separation of the9 I30 MOSSES AND FERNS