No. 2] 
OF THE NORTH SEA. 
9 
The two following maps (fig. 2 and 3) show the distribution ol 
the three younger age-groups as found respectively during the summer 
and autumn cruises. As in the foregoing map all stations, where im¬ 
plements to catch small herrings have been used, are recorded and 
special signs show the trawl- and net-stations and the catch at each 
