32 
the first opportunity. In this he was successful, for on 
boarding a trawler fishing on the off-shore grounds on 
April 1st, mature Cod and Haddock were found, and the 
eggs fertilized; these were conveyed to the tanks in the 
manner already described, so that when I returned on 
April 9th, the embryos had been in the tanks for eight 
days, and development had proceeded so far that the 
larval fishes were clearly visible through the egg mem- 
branes. Considerable mortality had taken place amongst 
the embryos, and that continued to the end. 
“The embryos began to hatch out on the eleventh day 
after fertilization, and the last of them hatched out the 
following day. The larve gradually dwindled in number 
from day to day till at the end of seven days only one 
remained alive; the survivor was lost next day through 
being carried away by the vessel accidentally overflowing. 
Before my arrival the tanks had overflowed, the one into 
the other, thus mixing the embryos so that it is difficult 
to say now whether the larve of both Cod and Haddock 
were hatched. 
‘“This second experiment shows that it is possible to 
hatch out the embryos in the tanks supplied with sea 
water from the channel, and to keep the larve alive for 
several days after hatching. Further experiments are 
necessary in order to ascertain for how long a period the 
larvee can be kept alive by feeding them with ‘ plankton’ 
collected in our tow-nets. 
“For the greater part of the time that the hatching 
experiment was in operation, the water was used just as 
it was taken from the channel, and during all that period 
the weather was very unsettled, the sea washing up the 
mud and making the water, on some days, quite turbid; 
the fine mud consequently got in amongst the embryos, 
and, no doubt, had a bad effect upon them by adhering to 
