. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. KARYOKINETIC FIGURES OF CENTRIFUGED EGGS. 115 hyaline band. The granules of the ectoplasmic layer are ap- parently unaffected by the centrifugal force. The karyokinetic figure has been moved little, if at all, as is proved by the fact that there is an indentation opposite the outer pole, and by the relation of the ectoplasmic layer which exhibits the character- istic defect around the outer pole of the spindle, which I described in my first paper. That portion of the karyokinetic figure lying within the baso- phile cap parta
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. KARYOKINETIC FIGURES OF CENTRIFUGED EGGS. 115 hyaline band. The granules of the ectoplasmic layer are ap- parently unaffected by the centrifugal force. The karyokinetic figure has been moved little, if at all, as is proved by the fact that there is an indentation opposite the outer pole, and by the relation of the ectoplasmic layer which exhibits the character- istic defect around the outer pole of the spindle, which I described in my first paper. That portion of the karyokinetic figure lying within the baso- phile cap partakes of its character, and is as sharply differenti- ated from the remainder of the figure as the basophile cap itself is differentiated from the protoplasm of the hyaline band. As to the fiature of these differences: (i) the stain is much darker within the basophile cap ; (2) the rays of the aster are more. FIG. 9. Transverse section of parti-composition spindle. From section of an egg of Chirtopterus centrifuged 1,150 revolutions in 31 seconds at a radius of 13 cm. Half of the section of the spindle lies in the basophile cap. See text for further description. numerous than in the control (Fig. i) and also more granular; they are in fact obviously made up of linear arrangements of basophile granules ; (3) the spindle itself is more darkly stained within the basophile cap than outside of it ; this pertains to the fibers themselves, but I would not venture to say that the fibers are more numerous. Where a fiber either of the spindle or of the aster crosses the boundary between the basophile cap and the hyaline zone its character changes. Rays of the aster never extend into a compact mass of acidophile granules, hence the present figure is less developed on the right side than on the left. Fig. 5 represents a spindle placed tangentially to the basophile cap. The contour of the spindle is perfectly regular, but its. Please note that these images are extracted from scanned page imag
Size: 2326px × 1075px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
