. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 528 L. H. KLEINHOLZ interval the relation is a direct proportion until the maximum migration is attained at the maximum threshold concentration, the effect of supra- maximal concentrations being reflected in the levelling-off of the curves. This is in agreement with the known observations (Welsh, 1930Z?; Kleinholz, 1936) that migration of the distal retinal pigment to the light-adapted position requires between 30 and 45 minutes. A direct proportion is also shown when similar curves are drawn for intervals 15 and 75 minutes
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 528 L. H. KLEINHOLZ interval the relation is a direct proportion until the maximum migration is attained at the maximum threshold concentration, the effect of supra- maximal concentrations being reflected in the levelling-off of the curves. This is in agreement with the known observations (Welsh, 1930Z?; Kleinholz, 1936) that migration of the distal retinal pigment to the light-adapted position requires between 30 and 45 minutes. A direct proportion is also shown when similar curves are drawn for intervals 15 and 75 minutes after injection. 150 o o 100 LJ H o: o 50 LJ 0. -1 0 LOG. CONCENTRATION + 1 FIG. 15. The relation between migration of the retinal pigment and the con- centration of the injected stalk-extract. The values for the position of the pig- ment were calculated from Fig. 14. In determining the minimal threshold of the integumentary chroma- tophores, groups of 5 standard prawns which had been blinded a week previously by amputation of both eye-stalks were each injected with cc. of the prepared stalk-extracts. With concentrations of , , and eye-stalks per cc. there was maximum concentration of the chromatophoral pigment within 5 minutes after injection, ac- companied by the appearance of the characteristic diffuse blue colora- tion ; the erythrophores of animals treated with these extracts remained. 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
