SEA-FISHERIES LABORATORY. 81 



ing a few of the larvae hatched out, and two forms were 

 identified, from the arrangement of the colouring matter, 

 as being the larvae of Cod and Flounder. The third, a 

 colourless larva, was not identified, and only lived a few 

 days. The Cod and Flounder larvae lived for twelve days. 

 By this time the yolk sac had been completely absorbed, 

 but the larvae made no attempt to feed, although kept 

 supplied with plankton taken in the tow-net. 



On March 9th the steamer again visited the spawning 

 grounds, and this time secured a number of mature Cod, 

 Haddock, and Plaice, from which a quantity of eggs were 

 obtained and fertilized. These, however, were probably 

 not quite mature, and at the end of the following day 

 they had all died and sunk to the bottom of the tanks, 

 no development having taken place. The tow-nettings 

 contained an increased number of developing eggs of Cod, 

 Flounder, Plaice, &c. 



Amongst some living fish brought in by the steamer 

 from this expedition was a mature female Flounder. 

 These fish were placed in the tanks, and on the following 

 day the Flounder was observed to be shedding its eggs. 

 The fish was therefore taken out, and the eggs pressed 

 out into a jar, and successfully fertilized with the milt of 

 a male Flounder that had been captured, amongst other 

 fishes, in the Barrow Channel by Mr. Wright, a few days 

 previously. Development proceeded rapidly, and eight 

 days later all the larvae hatched out, there having been 

 practically no mortality amongst the eggs. The larvae 

 lived without loss for fourteen days. The contents of the 

 yolk sac had been absorbed several days previously. At 

 this stage a marked mortality set in, and during the next 

 few days the larvae died off rapidly. Notwithstanding the 

 various experiments tried to persuade them to feed, at the 

 end of eighteen days all had died. 



