Adhesive Eggs. 239 



hatch. It takes but a few days to absorb the sac ; this 

 also depends to a great extent on the temperature of 

 the water. After the sac is absorbed the fry should 

 be liberated as soon as possible, or a considerable loss 

 will be incurred by the little fellows devouring one 

 another. 



In the above paper Mr. Nevin has covered the 

 ground very well, and it only remains to say that Prof. 

 Reighard, of Michigan, in experimenting with these 

 eggs, obtained excellent results in overcoming the ad- 

 hesiveness by the use of cornstarch. 



CHAPTER XXIX. 



CATFISH. 



These fish, called "bullheads" in New York and 

 "bullpouts" and "hornpouts" in New England, are 

 very good table fish for many people. They -feed on 

 the bottom on worms, fish eggs, or any animal food. 

 As they feed mainly at night, they may forage on the 

 nests of the black bass; but as this is the first time 

 that such a thing has been hinted, I hasten to say that 

 it is merely a surmise. This family of fishes protect 

 their young 1 . 



