“…It has been found that intervals between moults are decreased by a number of weeks or Ill-Onths when eyestalks are removed from decapods (Smith 1940, Megusar 1912, Kleinholz & Bourquin 1941a . It has been suggested that this effect is a result of removal of an organ that normally checks metabolic rate (Menke· 1911, Plankemann 1935, cf., Hanstrom 1939.…”