sentences:  He included self decoration under the heading "Adventitious Protection", quoting Bateson's account of decorator crabs.In his "Adaptive Coloration in Animals" (1940), Hugh Bamford Cott describes self decoration under the heading "adventitious concealing coloration", also naming it "adventitious resemblance".He describes it as a device "perhaps unrivalled" for effective concealment, and points out that it is brought about and depends on "highly specialized behaviour".