CONCEALING COLORATION 



27 



The same two heads against the sky ; the black-and-white one hard to dis- 

 tinguish, though (as in most of these pictures) wholly uneclipsed, the brown one, 

 though masked by many branches, very conspicuous. 



The same two heads, but looked doicn at, as man commonly sees animals of 

 lower stature than his own. The black-and-white one now conspicuoitSj the brown 

 (of course counter-shaded) one hard to see. 



