Otoliths from group of Plaice 143 in. in length and five years old, showing white 
centre and four white rings. 
Otoliths from group of Plaice 18 in. in length and six years old, showing white 
centre and five white rings. 
HOW TO READ THE AGE OF A PLAICE BY THE RINGS ON THE 
OTOLITHS OR EAR-STONES. 
