. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTION OF COSCINASTERIAS. 119 a group of shorter rays. In the same months of 1915-1918, the percentage was , a sufficiently good agreement. This is about the maximum percentage of regenerating, or recently divided, individuals encountered during a twelve-month period. From Fig. 2 it is evident that the highest percentage of intact speci- mens not recently divided occurred during December to March 50 TO 60 50 40 50 ao 10. cQ LU cx: UM a o -3 U. *-* ^ ^ -} ^> ^ FIG. 2. The average percentage of Coscinasterias not
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. REPRODUCTION OF COSCINASTERIAS. 119 a group of shorter rays. In the same months of 1915-1918, the percentage was , a sufficiently good agreement. This is about the maximum percentage of regenerating, or recently divided, individuals encountered during a twelve-month period. From Fig. 2 it is evident that the highest percentage of intact speci- mens not recently divided occurred during December to March 50 TO 60 50 40 50 ao 10. cQ LU cx: UM a o -3 U. *-* ^ ^ -} ^> ^ FIG. 2. The average percentage of Coscinasterias not showing evidence of _- recent self-division, during each month (1915—18). —the percentage then rather rapidly sinking to a minimum dur- ing midsummer. There is a certain correlation between the course of the curve of self-division (Fig. 2) and that of temperature-variation in the sea water. I reproduce here a seasonal temperature graph derived from figures given by Verrill (1902), together with the averages of my own data; the curves agree rather well, in spite of the fact that my temperature readings were not very numerous, nor systematically taken, but were obtained mainly for different special purposes having to do with other problems. In comparing Figs. 2 and 3, it must be recalled that the " curve of self-division " is non-quantitative in one important respect: the percentages of dividing animals include data derived from indi-. 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
