. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SURFACE CHANGES DURING CELL DIVISION 261 region of the surface showing the granule patterns in sharp focus. Photographs of the polar surface and views of the furrow seen from the polar axis were taken with the microscope in horizontal position. The eggs were mounted between cover and slide and sealed with Vaseline. When the microscope was tilted into the hori- zontal position, the eggs came to rest on a glass hair. An occasional cleaving egg was found to be oriented with its long axis coincident with the optical axis. With t
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. SURFACE CHANGES DURING CELL DIVISION 261 region of the surface showing the granule patterns in sharp focus. Photographs of the polar surface and views of the furrow seen from the polar axis were taken with the microscope in horizontal position. The eggs were mounted between cover and slide and sealed with Vaseline. When the microscope was tilted into the hori- zontal position, the eggs came to rest on a glass hair. An occasional cleaving egg was found to be oriented with its long axis coincident with the optical axis. With this technique one polar surface and the equatorial (furrow ) plane were observed with good resolution. The inner furrow margin was seen to close like an iris dia- phragm, as in Figures 1. 2, 3 and 4. The division of quarter blastomeres can be viewed in this aspect on the upright microscope. Polyspermic eggs show multiple and intersecting furrows during the first cleav- age, in which the regions of furrow intersection show characteristics not found in. 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
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
