Note 133 — Chapter VI · CRUSTACEA (CONTINUED)—EUMALACOSTRACA (CONTINUED): EUCARIDA—EUPHAUSIACEA—COMPOUND EYES—DECAPODA

Keeble and Gamble, Phil. Trans., Ser. B, cxcvi., 1904, p. 295. The chromatophores are also directly responsive to light, but the lasting adaptations to colour-backgrounds are brought about indirectly, the stimulus being transmitted through the eyes and nervous system. The influence of light may also affect the metabolism of the animal, the chromatophores being accompanied by a ramifying fatty tissue, which disappears if the animal is kept in the dark.