34 
another, and not until he had disposed of thirteen herrings 
did he cry enough. Perhaps you may say it was because 
he was hungry that he took fish, but'at the same time we’ 
had in the tank a shoal of ten or twelve splendid cod, 
averaging fully 2olb. weight each, and in prime condition, 
on which we experimented. Shortly after we had a big 
haul of small flat fish. As we did not want them in the 
hall tanks, I told the men to take the fishes and pour them 
into the big tank to see what would be the result with the 
big cod. They recognised the presence of the flat fish’ 
immediately ; their lethargic condition was thrown off 
instantly. You could scarcely credit that they were the 
same fish which had been swimming so quietly and 
solemnly round the tank; they were now so full of 
animation as they dashed wildly after their prey. Many 
were caught before they reached the bottom, and those 
that survived showed clearly by their actions that they, 
too, grasped the situation, and knew well enough that’ 
crustacea are not by any means the main food of the cod.’ 
They instantly covered themselves with sand and ap-' 
parently disappeared. The cod, however, knew better. 
They commenced to hunt for them, carefully and systemati- 
cally quartering their ground as a well-trained pointer 
would do, and affording a beautiful illustration of the use 
of the curious “‘ beard” possessed by many members of the 
cod family. By-and-bye, one of them, by means of this’ 
