170 PISH HATCHING. 



stronger constitution, a better supply of food, 

 and other minor advantages, will make all 

 the difference both in the size of human 

 beings and also . in the size of fish ; and this 

 law will apply to nearly all races of animals. 

 If, again, we find, what is not uncommon 

 among ourselves, viz., a specimen of ' a little 

 old man,' why should not we also find 'a 

 Httle old fish 1 ' 



" After the meeting of the Zoological So- 

 ciety, I next morning carefully dissected the 

 fish in the bright sunlight and under clear 

 pure water, for I like always to look into the 

 insides as well as the outsides of specimens ; 

 not only for information's sake, but because 

 it adds additional value to their history. 



" I was rewarded for my pains, for I dis- 

 covered a great difference in the contents of 



