Plate XI 
Fig. 1. 
Otoliths of a Plaice, shewing seven years growth 
Coi is'lto. 
* 4 
Salmon is llr$* 
Fig. 2. 
Otoliths of a Cod and of a 
Salmon, each fish weighing 15h>s 
The Cod’s otolith is 160 times 
heavier than that of the Sal¬ 
mon of same weight. 
