The structure & development of the mosses and ferns (Archegoniatae) . alf of the erribryo, thesesecondary walls may intersect the basalwall. In no cases seen was there anyindication of a two-sided apical cellsuch as Hofmeister ^ figures for Targi-onia, and probably his error arose from Fig. lo.—Corsinia marchantioids . - ^ . ^, J , (Radd). Young sporogonium, a study of forms where the quadrant optical section, x 300 (Leitgeb).walls were somewhat inclined, in which case the intersection of one of the secondary walls withit might cause the apex of the embryo to be occupied bya cell that, in sect
The structure & development of the mosses and ferns (Archegoniatae) . alf of the erribryo, thesesecondary walls may intersect the basalwall. In no cases seen was there anyindication of a two-sided apical cellsuch as Hofmeister ^ figures for Targi-onia, and probably his error arose from Fig. lo.—Corsinia marchantioids . - ^ . ^, J , (Radd). Young sporogonium, a study of forms where the quadrant optical section, x 300 (Leitgeb).walls were somewhat inclined, in which case the intersection of one of the secondary walls withit might cause the apex of the embryo to be occupied bya cell that, in section, would appear like the two-sidedapical cell of the Moss embryo. The regular formation ofoctants was observed by me in Fiuibriaria Californica,and by Kienitz-Gerloff and others in MarcJiantia, Grinialdia,and Preissia, and probably occurs normally in all Mar-chantiaceae. After the first anticlinal walls are formed in the octants, nodefinite order could be observed in the succeeding cell divisions, 1 Hofmeister (i), PL XV. Figs. 24, 25. - Kienitz-Gerloff (i, 2).. 6o MOSSES AND FERNS CHAP. especially in the lower half of the embryo. In the upper partpericlinal walls appear, but not at any stated time, so far ascould be made out, and the first ones do not, as Leitgeb asserts,
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