. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 146 MILTON FINGERMAN AND DONALD W. TINKLE pans and the remaining specimens were placed into white enameled pans. The four pans were then placed under an illumination of 40 ft. c. light intensity for 120 minutes after which time the average chromatophore stage of the prawns in each pan was determined. Light intensities were measured by means of a General Electric Photometer. The Palaemonetes on the black and white backgrounds were then exchanged so that the prawns which had been originally on a black background were transferr
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 146 MILTON FINGERMAN AND DONALD W. TINKLE pans and the remaining specimens were placed into white enameled pans. The four pans were then placed under an illumination of 40 ft. c. light intensity for 120 minutes after which time the average chromatophore stage of the prawns in each pan was determined. Light intensities were measured by means of a General Electric Photometer. The Palaemonetes on the black and white backgrounds were then exchanged so that the prawns which had been originally on a black background were transferred to a white background and vice versa. Average chromatophore stages for the prawns in each pan were then determined 15 and 30 minutes after the backgrounds had been exchanged. The experiment was repeated once and the results averaged to prepare Figure 1 in which each point represents the average of 20 individuals. As is evident from the figure, the white pigment of both species concentrated when prawns were placed UJ O UJ cr O £3 O O cr x u A. B. 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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