THE WARTY CHAMELEON 140 Photos: W. S. Berridge, F.Z.S. SEASONAL COLOUR-CHANGE: SUMMER SCENE IN NORTH SCANDINAVIA 141 PROTECTIVE RESEMBLANCE 142 Photo: J. J. Ward, F.E.S. WHEN ONLY A FEW DAYS OLD, YOUNG BITTERN BEGIN TO STRIKE THE SAME ATTITUDE AS THEIR PARENTS, THRUSTING THEIR BILLS UPWARDS AND DRAWING THEIR BODIES UP SO THAT THEY RESEMBLE A BUNCH OF REEDS 143 PROTECTIVE COLORATION OR CAMOUFLAGING, GIVING ANIMALS A GARMENT OF INVISIBILITY (_Coloured Illustration_) 144 ANOTHER EXAMPLE OF PROTECTIVE COLORATION (_Coloured Illustration_) 144 DEAD-LEAF BUTTERFLY (_Kallima Inachis_) FROM INDIA 146 PROTECTIVE RESEMBLANCE BETWEEN A SMALL SPIDER (_to the left_) AND AN ANT (_to the right_) 146 THE WASP BEETLE, WHICH, WHEN MOVING AMONGST THE BRANCHES, GIVES A WASP-LIKE IMPRESSION 147 Photo: J. J. Ward, F.E.S. HERMIT-CRAB WITH PARTNER SEA-ANEMONES 147 CUCKOO-SPIT 147 Photo: G. P. Duffus. CHIMPANZEE, SITTING 156 Photo: New York Zoological Park. CHIMPANZEE, ILLUSTRATING WALKING POWERS 156 Photo: New York Zoological Park. SURFACE VIEW OF THE BRAINS OF MAN AND CHIMPANZEE 157 SIDE-VIEW OF CHIMPANZEE'S HEAD 157 Photo: New York Zoological Park. PROFILE VIEW OF HEAD OF PITHECANTHROPUS, THE JAVA APE-MAN, RECONSTRUCTED FROM THE SKULL-CAP 157 After a model by J. H. McGregor. THE FLIPPER OF A WHALE AND THE HAND OF A MAN 157 THE GORILLA, INHABITING THE FOREST TRACT OF THE GABOON IN AFRICA (_Coloured Illustration_) 158 "DARWIN'S POINT" ON HUMAN EAR 160 PROFESSOR SIR ARTHUR KEITH, M.D., LL.D., F.R.S. 161 Photo: J. Russell & Sons. SKELETONS OF THE GIBBON, ORANG, CHIMPANZEE, GORILLA, MAN 161 After T. H. Huxley (by permission of Messrs. Macmillan). SIDE-VIEW OF SKULL OF MAN AND GORILLA 164 THE SKULL AND BRAIN-CASE OF PITHECANTHROPUS, THE JAVA APE-MAN, AS RESTORED BY J. H. MCGREGOR FROM THE SCANTY REMAINS 164 SUGGESTED GENEALOGICAL TREE OF MAN AND ANTHROPOID APES 165 THE GIBBON IS LOWER THAN THE OTHER APES AS REGARDS ITS SKULL AND DENTITION, BUT IT IS HIGHLY SPECIALIZED IN THE ADAPTATION OF ITS LIMBS TO ARBOREAL LIFE 166 Photo: New York Zoological Park. THE ORANG HAS A HIGH ROUNDED SKULL AND A LONG FACE 166 Photo: New York Zoological Park.