THE SEA FISHERIES 



271 



classed the fishing for crabs, shrimps, lobsters, and mussels 

 and oysters. This, the shellfish industry, is of great 

 economic importance and is dealt with separately in 

 Chapter XIV. 



Fig. 56. — Map of the trawling grounds fished by British trawlers. 

 The Roman numerals are the statistical regions. 



The deep-sea fisheries other than that for the herring 

 (Fig. 56) are on the whole carried out far from the land 

 by steam vessels which may remain away from their port 



