TO 

 THE MEMORY OF 



GEORGE WILLIAM, 13th EARL OF DALHOUSIE, 



CHAIRMAN OF THE ROYAL COMMISSION ON TRAWLING, 1883—85, 



AND SUBSBaUENTLY SECRETARY FOR SCOTLAND, 



A NOBLEMAN DISTINaUISHED NO LESS FOR 



HIS INTEREST IN THE WELFARE OF THE FISHING POPULATION 



THAN FOR HIS SYMPATHY WITH 



THE SCIENTIFIC INVESTIGATION OF THE FISHERIES, 



THIS WORK IS DEDICATED 



BY THE AUTHORS. 



