LARVAL FISHES : THEIR METAMORPHOSES. 135 



transformations to be found amongst the fishes, 

 though in these two particular instances we have 



Fig. 13. — Three stages in the development of the Sword fish 

 (after Giinther). 



the most interesting of them all. The signifi- 

 cance of transformations is in some cases more 

 or less obvious and intelligible ; but as often as 



