Journal of experimental zoology . ve hemisphere. Fig 18. Eggs in sea-water at p. m. Centrifuged p. m. Fertilized p. m. The gray cap extends into the polar lobe. Beginning of the first cleavage. Fig. 19. Eggs in sea-water a. m. Centrifuged a. m. Fertilized a. m. Drawn M. The gray cap surrounds the maturation spindle and is thus ring-shaped. Fig. 20. Eggs in sea-water p. m. Fertilized p. m. Centrifuged p. m. Drawn M. The gray cap has passed entirely into the larger cell CD. Fig. 21. Eggs in sea-water a. m. Centrifuge
Journal of experimental zoology . ve hemisphere. Fig 18. Eggs in sea-water at p. m. Centrifuged p. m. Fertilized p. m. The gray cap extends into the polar lobe. Beginning of the first cleavage. Fig. 19. Eggs in sea-water a. m. Centrifuged a. m. Fertilized a. m. Drawn M. The gray cap surrounds the maturation spindle and is thus ring-shaped. Fig. 20. Eggs in sea-water p. m. Fertilized p. m. Centrifuged p. m. Drawn M. The gray cap has passed entirely into the larger cell CD. Fig. 21. Eggs in sea-water a. m. Centrifuged a. m. Fertilized a. m. A. M. The gray cap lies opposite to the animal pole. Fig. 22. Drawn ^- ^- History otherwise the same as No. 21. Shows intermediate positionof gray cap. Fig. 23. In sea-water A. m. Centrifuged at same time before rupture of the germinal stratification. Note the position of the nucleolus within the germinal vesicle. Elementary Phenomena of Embryonic Development i8l. Fig. 17 Fig. 18
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1904
