6 
SUMMARY AND GENERAL REPORT. 
The following report is little more than a summary of the 
routine work for the year, but the results are interesting if they 
are presented without detailed analysis. 
It is important to note that the trawling experiments for the 
year demonstrate that the falling off of recent years has ceased, 
and the figures once more show a distinct upward tendency. The 
returns should be compared with those given in the detailed account 
of the last report. 
With regard to the migrations experiments the most interesting 
results refer to flounders, which are clearly proved to migrate in 
the adult condition into Scottish waters. The majority of the 
migrants have been captured on the coast of Fife. 
It is now quite clear, moreover, that a similar migration — 
indicated before by our earlier experiments — takes place in the 
case of crabs. It is evidently only the females, however, which, 
during the winter migration into deeper water, find their way to 
a more northerly part of the coast. The majority have been 
caught between Berwick and St. Abb’s, but some have migrated 
still further north. As these experiments have been made with 
crabs which were still relatively soft after the autumn ecdysis, it 
is possible that the migration is confined to females which have 
recently “cast.” In this connexion it is interesting to note that 
examples are given of crabs which had not “ cast ” for several 
years. 
Miss M. V. Lebour, B.Sc., has made an investigation into the 
condition of the mussel beds of Northumberland, and the results 
are given in this report. Each bed has been examined, and the 
