Untitledthere any white _pigment_; the white _colour_ is like that of snow orfoam, it is due to the complete reflection of the light from innumerableminute surfaces of crystals or bubbles.[Illustration: _Photo: W. S. Berridge, F.Z.S._BANDED KRAIT: A VERY POISONOUS SNAKE WITH ALTERNATING YELLOW AND DARKBANDSIt is very conspicuous and may serve as an illustration of warningcoloration. Perhaps, that is to say, its striking coloration serves asan advertisement, impressing other creatures with the fact that theBanded Krait should be left alone. It is very unprofitable for a snaketo waste its venom on creatures it does not want.][Illustration: _Photos: W. S. Berridge, F.Z.S._THE WARTY CHAMELEONThe upper photograph shows the Warty Chameleon inflated and conspicuous.At another time, however, with compressed body and adjusted coloration,the animal is very inconspicuous. The lower photograph shows the suddenprotrusion of the very long tongue on a fly.][Illustration: SEASONAL COLOUR-CHANGE: A SUMMER SCENE IN NORTH
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