. Journal of morphology . tafor Chart VII. Although obtained at the same hour as the egg forChart VI, it was probably fertilized earlier; for it shows a later stageof development. Chart VII A is a free hand drawing, but a photo-graph of another egg of about the same stage is shown in Fig. this stage the peripheral limit of the periblast does not show insurface view. In sections of the egg, however, nuclei are found inmarginal and central periblast—see Chart VII B and C, and alsoFig. 11, which represents a central transverse section of the eggof this chart. From this figure it is plain th
. Journal of morphology . tafor Chart VII. Although obtained at the same hour as the egg forChart VI, it was probably fertilized earlier; for it shows a later stageof development. Chart VII A is a free hand drawing, but a photo-graph of another egg of about the same stage is shown in Fig. this stage the peripheral limit of the periblast does not show insurface view. In sections of the egg, however, nuclei are found inmarginal and central periblast—see Chart VII B and C, and alsoFig. 11, which represents a central transverse section of the eggof this chart. From this figure it is plain that the marginal cellsconstitute a zone of junction between the blastodisc and the peri-blast Agassiz and Whitman, 84). 18 Mary Blount. Summary of the Facts Illustrated by the Charts. 1. During the maturation stage, the supernumerary sperm nucleimigrate from the blastodisc into the periblast. 2. The supernumerary sperm nuclei multiply by division in theperiblast and migrate peripherally in the marginal periblast. In sub-.
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