AETIFICIAL HATCHING OF SPAWN. 75 



young fry will take the embryo as soon as it appears 

 with great avidity. One of his reasons for prefer- 

 ring this food is certainly a very valid one, and it 

 is, that such food is not likely to die and putrify, 

 and there is not much difficulty in obtaining large 

 quantities of such spawn or in hatching it, as very 

 many of the coarse fish are spawning from April 

 to June, which is just the period when such food is 

 required ; as the fish increase in size chopped liver 

 can easily be substituted. He also mentions the 

 almost microscopic crustacese of the species Cythere, 

 Cypres, and Cyclops, which abound in stagnant 

 waters, newly-hatched earth worms, &c. &c. 



