148 



A NATURAL HISTORY OF THE SEAS 



colouring to its descendants as a memento of the 

 event. 



J'-. fc-V -'•.-/ *,' dmhi2i£tt»» J >•. 1 



u.ft Vr B, 



John Dory 



These and many similar stories though of interest 

 scarcely explain the raison d'etre of piscine colouring and 

 colour changes. The emotions and exigencies of life 



