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The germ-cells appear first in the entoblast of the vascular area of the blastoderm. They lie cephalad, caudad, and laterad to the embryo. 2. The germ-cells migrate in the entoblast of the blastoderm, yolk-stalk, and intestine, and the sclerotome of the mesentery, to the germinal anlagen. Very many leave this path and come to lie in various regions of the embryo. 3. Some of these abnormally placed germ-cells probably degenerate.
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MAY M. JARVIS (1908) studied this question.
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