. The wonder of life. Biology; Natural history; Zoology. 544 THE WONDER OF LIFE of a shore-crab is directly influenced, while the sheU is being formed after a moult, by the dominant colour of the immediate environment. There can be no doubt that certain colour-reactions which follow reflexly and necessarily often look as if they ^,-. FlG. 87.—Much branched ohromatophore of a prawn, Praunus flexuoxus. {After Degner.) The pigment flows out along the root-like branches or contracts centripetaUy. The ohromatophore seems to arise from a combination of cells—a syncytium. should be advantageous, but
. The wonder of life. Biology; Natural history; Zoology. 544 THE WONDER OF LIFE of a shore-crab is directly influenced, while the sheU is being formed after a moult, by the dominant colour of the immediate environment. There can be no doubt that certain colour-reactions which follow reflexly and necessarily often look as if they ^,-. FlG. 87.—Much branched ohromatophore of a prawn, Praunus flexuoxus. {After Degner.) The pigment flows out along the root-like branches or contracts centripetaUy. The ohromatophore seems to arise from a combination of cells—a syncytium. should be advantageous, but it is difficult to give direct proof of this. One of the prawns, Palcemon treilliamos studied byFrohlich (1910) is blue^or green by day,!^when its red chromatophores are strongly contracted, and reddish- brown by night, when the red chromatophores expand, ^heft one is put into a vhite porcelain yessel il^ 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 Thompson, John Arthur, Sir, 1861-1933. London, A. Melrose, Ltd
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Keywords: ., bookcentury1900, booksubjectnaturalhistory, booksubjectzoology
