List of Plates 



COMMON BROWN TROUT REFLECTING ITS SURROUND- 

 INGS (Colour) .... Frontispiece 



Facing page 

 A HIGHLAND LOCH AND UNDER-WATER VIEW OF THE 



SCENE ....... 3 



LESSER BLACK-BACKED GULL, PENGUIN AND RAINBOW 



TROUT ....... 4 



APPEARANCE FROM UNDER THE WATER, WHEN THE 

 SUBJECT IS PARTIALLY ABOVE AND PARTIALLY 

 BELOW THE SURFACE ..... 5 



METHODS OF SUBAQUEOUS OBSERVATION . . 8 



OBSERVATION TANK IN THE BANK OF A CONTROLLED 



STREAM ....... 8 



WHITE CARDBOARD REFLECTING GREEN COLORATION 



ON A ROAD (Colour) .... 10 



WHITE ANEMONE IN THREE DIFFERENT SITUATIONS 



(Colour) 10 



TWO VIEWS OF THE SAME WATER-HEN SWIMMING IN 



THE AREA OF TOTAL REFLECTION (Colour) . 12 



A WHITE SAUCER FLOATING ON THE SURFACE OF THE 



WATER AS SEEN FROM BELOW ... 14 



BROWN TROUT WAITING FOR FOOD ... 18 



.THE " FLASH " AS THE TROUT TURNS TO PICK UP A 



WORM . . . . ... 18 



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