. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 52 JOHN K. HARRISON AND IRYIXC KLEIN and six blastoderms incubated for 2 to 18 hours at the high temperature had an average hourly increase of mm. In this comparison only growth of the low temperature blastoderms during the first nine days was considered, since it is felt that the increase from the ninth to tenth day is not true growth, rather an increase in diameter resulting from degenerative spreading. ANIDIAN AND DEGENERATE STREAK PRODUCTION AT 25° C. 100. 14 15 ANIDIANS U NORMALS FIGURE 2 DEGENERATE There is a co
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 52 JOHN K. HARRISON AND IRYIXC KLEIN and six blastoderms incubated for 2 to 18 hours at the high temperature had an average hourly increase of mm. In this comparison only growth of the low temperature blastoderms during the first nine days was considered, since it is felt that the increase from the ninth to tenth day is not true growth, rather an increase in diameter resulting from degenerative spreading. ANIDIAN AND DEGENERATE STREAK PRODUCTION AT 25° C. 100. 14 15 ANIDIANS U NORMALS FIGURE 2 DEGENERATE There is a corresponding slowed differentiation of primitive streaks in blasto- derms incubated at the low temperature. Primitive streaks, as distinguished from the more diffuse primitive shields, first appear in blastoderms incubated at the low temperature after forty-eight hours of incubation. At the high temperature, primi- tive streaks first appear after four hours of incubation. The ratio of development, as measured by streak appearance, between blastoderms incubated at the high tern-. 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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