. Journal of experimental zoology. Fig. 54 Fig. 55. Fig. 56 Fig. 57 Figs. 54 to 58. Stages in the differentiation of uninucleated unsegmented eggs drawQ from livingmaterial. E, Ectoplasm; e, endoplasm; , ectoplasmic defect; , polar ectoplasm; re-mainder of gray cap (residual substance of germinal vesicle). Fig. 54. Eggs put in ninety-five parts sea-water plus five parts of a two and one-half M KCl solu-tion at p. M. Transferred to sea-water at 5 p. m. Drawn at p. m., two hours from the begin-ning of the experiment. Fig. 55. Eggs put in ninety-five parts sea-water plus fi

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. Journal of experimental zoology. Fig. 54 Fig. 55. Fig. 56 Fig. 57 Figs. 54 to 58. Stages in the differentiation of uninucleated unsegmented eggs drawQ from livingmaterial. E, Ectoplasm; e, endoplasm; , ectoplasmic defect; , polar ectoplasm; re-mainder of gray cap (residual substance of germinal vesicle). Fig. 54. Eggs put in ninety-five parts sea-water plus five parts of a two and one-half M KCl solu-tion at p. M. Transferred to sea-water at 5 p. m. Drawn at p. m., two hours from the begin-ning of the experiment. Fig. 55. Eggs put in ninety-five parts sea-water plus five parts of a two and one-half M KCl solu-tion at A. M. Transferred to sea-water at a. m. Drawn about P. M., four hours fromthe beginning of the experiment. Fig. 56. Same history as Fig. 55. Fig. 57. Eggs put in eighty-five parts sea-water plus fifteen parts of a two and one-half M KClsolution at a. m. Transferred to sea-water at 12 oclock, noon. Drawn p. m., five hoursfrom the beginning of the experiment. 226 Frank R.

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904