LIST OF ILLUSTRATIONS ix 



Facing page 

 SMELT 1 



RAINBOW TROUT ... ... . > 46 



BROWN TROUT . . . . . ) 



HATCHING OF THE SALMON . . . . .50 



BROWN TROUT TWO WEEKS OLD ...... 



BROWN TROUT FIVE WEEKS OLD .... .52 



SALMON FRY, SEVEN WEEKS OLD SHOWING EARLY PARR MARKS 



LIFE OF A SALMON AS READ BY THE SCALE 1. ... 62 



LIFE OF A SALMON AS READ BY THE SCALE II. ... 64 



SEA TROUT, PHOTOGRAPHED BY FRONT LIGHT, SHOWING ITS 



SILVERY BODY . . . . . . , 



RAINBOW TROUT. THE SILVERY BODY REFLECTING THE COLOUR 

 OF THE WATER . _4 -_/. . . .. . * 



RAINBOW TROUT AS SEEN IN THE POND . ' . . 84 



A RISE AS SEEN FROM BELOW THE SURFACE OF THE WATER . 90 

 THROAT TEETH OF THE CARP . . . * . . . ^ 



THE CARP ; * ' " -' . . . !- 96 



MOUTH OF THE CARP . . . . . J 



THE GOLD FISH . . .. . . .-' . 98 



WATER SUPPLY AND BOX USED FOR REARING ROACH . .100 



THROAT TEETH OF CHUB > . . . . . . | 



CARP, HATCHED SIX HOURS . . . . . . . r 102 



SWIM-BLADDER OF CRUCIAN CARP . , . . , ' . f . . J 



FIRST TWO DAYS IN THE LIFE OF A ROACH . . . . 104 



GROWTH OF SWIM-BLADDER I ROACH '. . . 106 



NEWLY HATCHED PLAICE . . V . . 110 



PLAICE, HATCHING HEAD FIRST . . 



PLAICE, HATCHING TAIL FIRST. . < . . 



PLAICE ENLARGING RENT IN THE EGG MEMBRANE ' . . \-114 



PLAICE, NEWLY HATCHED . . * , , s 



PLAICE, EIGHT DAYS OLD < , . . . 



STAGES IN THE TRANSFORMATION OF THE PLAICE, SHOWING HOW 



THE FISH BECOMES FLAT AND THE LEFT EYE IS CARRIED OVER 114 

 ADULT PLAICE . .' . . . . . . . ) .._ 



:- llO 



POOLS THAT HOLD YOUNG FLAT FISH . . . . ) 



HOW TO READ THE AGE OF A PLAICE BY THE RINGS ON THE OTOLITHS 



OR EAR-STONES i . . . .... 118 



THE COMMON SEA URCHIN . . . . . . .142 



