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Biol Bull 67: 365-380. (December 1934)
© 1934 Marine Biological Laboratory
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THE CHEMICAL NATURE OF THE PIGMENTS AND THE TRANSFORMATIONS RESPONSIBLE FOR COLOR CHANGES IN PALÆMONETES

F. A. BROWN JR. 1

1 From the Biological Laboratories, Harvard University, and the Woods Holé Oceanographic Institution, Woods Hole, Mass.

The red pigment of Paloeligmonetes vulgaris appears to be astacin, while the yellow seems to be identical with plant carotin.

A method is set forth to measure the rate of formation and destruction of pigment within the shrimps. It is observed that the red and blue pigments are most rapidly formed and destroyed, while the yellow and white pigments are much more slowly changed.

Upon a white background in the light the red and blue pigments are destroyed very rapidly. Yellow disappears slowly.

Upon a black background in the light the red and blue pigments are formed.

Shrimps kept in darkness at first lose through destruction their red and blue pigment but after about two weeks there occurs a reversal of this process (pigment formation).






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