Color Changes in Cancroid Crabs of Bermuda

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Abstract
The pigmentary system of 2 Portunid crabs of Bermuda consists mainly of black, white, yellow and red pigments, all of which are contained within chromatophores. Iridescent colors and a bluish pigment are also present, but are not confined to special bodies. The red, white, black, and possibly the yellow pigments undergo alterations in distribution with respect to variously colored environments. Blinding results in the concentration of the black pigment masses. This behavior is discussed in relation to the effect of hypophysectomy in lower fishes, amphibians and some reptiles.

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