BYE-DAT SEMINISCBNCES. 199 



fast ; there they dig out a trough^ in which the female 

 deposits her ova, and on that the male sheds his milt ; 

 thrn the trough is covered up, and nature does the 

 remainder. 



The ova take about 90 days to hatch out, and the 

 colder the water, the more time they will require, and 

 the stronger will be their constitution. 



The ova of trout take about 60 days to hatch, and are 

 in the same manner influenced by the temperature of 

 the water. 



