LIST OF ILLUSTRATIONS 



PERCH PALING WITH FEAR (Co/our) . . . Frontispiece 



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OBSERVATION POND EMPTY * . . ) 



t * 



OBSERVER DESCENDING INTO OBSERVATION CHAMBER . . j 



LOOKING INTO THE OBSERVATION CHAMBER FROM POND, SHOWING 



HOW THE GLASS BECOMES A MIRROR AND PREVENTS THE FISH , . 

 SEEING THE OBSERVER ...... 



LOOKING INTO THE POND FROM THE OBSERVATION CHAMBER 



RAINBOW TROUT; TO SHOW EXTERNAL FEATURES . . . xiv 



VARYING ATTITUDES OF A PIKE . . .<,.'. . 2 



ATTITUDE OF A PIKE SHOWING INTENTION TO ATTACK 



PIKE RIGID WITH EXCITEMENT ,..* 



EMOTIONAL ATTITUDES OF A PIKE . . , , . . 4 



A PERCH SHOWING ALARM . ... . . . 6 



PERCH BECOMING PALE FROM FEAR . --'. ^ 



PIKE AS SEEN IN THE POND . . . . . . . I 



! o 

 PIKE FOLLOWING UP A ROACH . . . . . . j 



EGGS OF CARTILAGINOUS FISHES . . . . . .10 



EGGS OF BONY FISHES ... _ r . . . . .12 



MALE STICKLEBACK BUILDING NEST 



MALE STICKLEBACK DRIVING FEMALE TO NEST . . . , * 



STICKLEBACK ON GUARD. . . . . . . J 



STICKLEBACK ON GUARD. . ... . . "\ 



STICKLEBACK RESENTING INTRUSION OF THE CAMERA . . j- IS 



STICKLEBACKS DEVOURING EGGS . . . . . . J 



FUNGOID GROWTH ON DEAD EGG . . * . . . 18 

 TROUT ALEVINS DESTROYED BY FUNGUS ..... 20 



GUDGEON AS PHOTOGRAPHED IN A TANK . . . . ^ 



GUDGEON AS SEEN IN NATURAL ENVIRONMENTS . . . j 

 D\CE, SHOWING ITS DARK BACK, SILVERY SIDE, AND WHITE UNDER- j 



SURFACE . . . . . . . , . . L 22 



DACE REFLECTING BARS UPON ITS BODY . 



