The Rising Generation 



depth of a hundred feet with their 

 tightly-packed shells. 



When, however, a comparatively small 

 number of eggs are laid a mere hundred 

 or so, for instance considerable anxiety 

 is often shewn by the parents who may 

 take various ingenious precautionary 

 measures to safeguard their offspring 

 through the earlier pitfalls on the road 

 to maturity. Instances of this " wise 

 parentage " amongst fishes might be 

 cited almost ad infinitum. The " nest- 

 ing " of the salmon and the lamprey will 

 occur to all, the one fish clearing a space 

 on the gravel reach with its tail, the 

 other moving stone by stone with its 

 suctorial mouth. The American bow-fin 

 and the British lump-sucker both make 

 elaborate nests, whilst the common 

 stickleback the " tiddler " of the London 

 parks offers a classic example of a 

 fish raising a structure almost worthy 

 of avian workmanship. The cichlid 



