. The Scottish botanical review . Fig. I.—A, embryo-sac oi Aglaonenia comnnitaium, showing the laterally placedembryo, ew., x 60. B, a similar embryo-sac of A, modestum ; the embryo isat the base of the sac, x 80. C, three sections of a young embryo of mil, x 160. {0) is still undivided, and in this case one of the synergidaeshowed some evidences of degeneration. A more advancedstage is figured in 38. This embryo was two-celled, and theendosperm completely filled the embryo-sac. A still moreadvanced stage of this same species is shown in fig. 41. Theembryo is an elongated mass of cell

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. The Scottish botanical review . Fig. I.—A, embryo-sac oi Aglaonenia comnnitaium, showing the laterally placedembryo, ew., x 60. B, a similar embryo-sac of A, modestum ; the embryo isat the base of the sac, x 80. C, three sections of a young embryo of mil, x 160. {0) is still undivided, and in this case one of the synergidaeshowed some evidences of degeneration. A more advancedstage is figured in 38. This embryo was two-celled, and theendosperm completely filled the embryo-sac. A still moreadvanced stage of this same species is shown in fig. 41. Theembryo is an elongated mass of cells embedded in the endo-sperm at the base of the sac. In this specimen the two typesof endosperm tissue were particularly distinct. The small-celled, actively dividing layer next to the wall on the concaveside contrasted strongly with the larger, thinner-walled cellsfilling up the rest of thesac. Text-figure i, C, represents three sections of the same THE EMBRYO-SAC OF AGLAONEMA I I I embryo shown in PI. IV. fig. 41. There is a

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectplants, bookyear1912