多毛環虫ルムブリコネイレスの発生期に於ける躰色素の実験的変色の軸示差

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On cell death resulted from the exposure to hypotonic and hypertonic sea water and also to diluted solution of ammonium or acetic acid in sea water, general bright-orange coloration of eggs and early embryos of Lumbriconereis latreilli becomes purplish brown, and yellow globules or patches, distributed in each segment of the young larvae, change into dark red in tint. With use of adequate lethal concentrations, the color change of these pigments takes place in a definite order or orders along the longitudinal axis. Before metamorphosis, bright-orange color changes its tone from apical (or anterior) end basally (or posteriorly), but, during metamorphosis, as the embryo elongates, it comes to change anteriorly from the posterior region as well as posteriorly from the anterior region. Metamorphosis being completed and when the larva has grown into more than ten segment stage, the color change of yellow pigment occurs first in the most posterior chaetigerous segment, progressing anteriorly
茨城大学文理学部の論文