242 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
5. Other Experiments. 
So far, the numbers of plaice liberated have been 
large enough to enable one to determine, with some 
degree of probability, the general movements of plaice 
in the eastern part of the Irish Sea. Other experiments 
made have either been too small to enable general results 
to be deduced, or they have been devised under 
conditions which did not render a successful result 
probable. Thus a few plaice were marked and set free 
during the winters of 1904 and 1906 on the Bahama 
Bank area, but the number was too small for results of 
value to emerge from the data. I do not discuss these 
here: the experiment is one which may profitably be 
repeated on a larger scale. Some flounders were marked 
and liberated, and though the results were encouraging, 
there are not enough data to discuss; here again the 
experiments ought to be repeated on a larger scale, for 
the flounder is a fish of some local value. Several brill 
were also marked, but not in large numbers. The fish 
is one which is favourable for the experimental methods, 
but it is not abundant enough*to be marked on a large 
scale. Soles were also marked, but no success attended 
the experiment. The method used for plaice is quite 
unsuitable for this fish. Only one cod was marked, and 
it was not recovered. Both plaice and flounders which 
had been kept throughout the winter in the hatchery 
tanks at Piel and Port Erin were marked and liberated. 
Some of the flounders were recovered, and one or two 
plaice were also recovered, but it is obviously the case 
that fish which have been kept in captivity in tanks or 
small ponds for many. months become so enfeebled that 
they do not survive the marking operation and the 
subsequent transportation. Of 23 plaice taken from the 
Piel Hatchery and set free near Blackpool, only two were 
