. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. POLARITY AND BILATERALITY OF THE ANNELID EGG. 75 lated at the central end of the egg (upper end in the figure). Innumerable cases of this kind are found in the preparations. Again, as already noted, the ectoplasmic granules tend to keep within the ectoplasmic zone with low powers of the centrifuge. 5.' • «•'•--• .-,.•;>.•.•-:©•:••>••;-; & >;. .-••;.•:"•.v:-i«^^ c FIG. 9. Section of an egg of Chtztopterus centrifuged 7,800 revolutions in one minute at a radius of 6 cm. The egg was killed
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. POLARITY AND BILATERALITY OF THE ANNELID EGG. 75 lated at the central end of the egg (upper end in the figure). Innumerable cases of this kind are found in the preparations. Again, as already noted, the ectoplasmic granules tend to keep within the ectoplasmic zone with low powers of the centrifuge. 5.' • «•'•--• .-,.•;>.•.•-:©•:••>••;-; & >;. .-••;.•:"•.v:-i«^^ c FIG. 9. Section of an egg of Chtztopterus centrifuged 7,800 revolutions in one minute at a radius of 6 cm. The egg was killed in Flamming's fluid, and the fat granules of the gray cap are stained black. The spindle blocks fat globules passing in a central direction (/). /-/, primary axis; 2-2, secondary axis; ec., ectoplas- mic spherules ; en., endoplasmic spherules in the distal hemisphere; /., fat globules blocked by the spindle, , gray cap ; , hyaline band. But with higher powers they pass to the distal pole of the egg. Nevertheless the ectoplasmic zone may be recognized without. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
Size: 1431px × 1746px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
