. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 506 NAOKUNITAKEDA. FIGURE 7. A, Appearance of nuclear folding found in the prothoracic glands. The nucleus is rounded and the folding does not appear in the diapausing stage; B, nuclear surface becomes irregular with the progress of activation; C, nucleus then begins to branch out into the cytoplasm; scale 1 /*. appeared lamellar, granular or nonstructured. Under low magnification, one of them had the appearance of an array of slender filaments more or less parallel to each other. Higher magnification demonstrated that they
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 506 NAOKUNITAKEDA. FIGURE 7. A, Appearance of nuclear folding found in the prothoracic glands. The nucleus is rounded and the folding does not appear in the diapausing stage; B, nuclear surface becomes irregular with the progress of activation; C, nucleus then begins to branch out into the cytoplasm; scale 1 /*. appeared lamellar, granular or nonstructured. Under low magnification, one of them had the appearance of an array of slender filaments more or less parallel to each other. Higher magnification demonstrated that they were actually bundles of minute straight tubules. Nonstructured granules, however, were also present and they occupied the greater part of the secretory substances. From the present fig- ures, the precise relationship between the secretory granules and ecdysone could not be deduced. Studies were then made of the cell membrane regarding the release of these sub- stances. The peripheral cell membrane of the prothoracic glands showed a form of microvilli (Fig. 12A) and through them the secretory substances seemed to be released. In the releasing stage, some substances always appeared in the peripheral region of the cytoplasm and further in the microvilli (Fig. 12B). The release of these substances was not observed in an intact form. Therefore, some substances found near the microvilli seemed to be the ones synthesized in the mitochondria. It is likely that the intact secretory substances collapsed and were released into the hemolymph through the microvilli in the releasing Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1
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