SEA-FISHERIES LABORATORY. 181 



(3) age, (4) sex, (5) condition, (6) phase of reproductive 

 organs. 



Deduction of the nature and amount of the migration Object, 

 from fishing ground to fishing ground, and between 

 territorial and extra-territorial fishing grounds; estima- 

 tion of the effect of the local Regulations with respect to 

 trawl-meshes, &c. 



Fortnightly Samples to be taken by the steamer Methods. 

 from : — 



Fishing grounds off the Ribble Estuary and 



along the coast to Liverpool Bay. 

 Fishing grounds in Red Wharf and Beau- 

 maris Bays. 

 Monthly Samples : — 



From fishing grounds in Cardigan Bay. 

 Fortnightly Samples taken by Bailiffs' sailing boats 

 from : — 



Fishing grounds in Barrow and Fleetwood 



Channels. 

 Fishing grounds in Mersey and Dee 

 Estuaries. 

 Monthly Samples : — 



From fishing grounds in Carnarvon Bay 



and Menai Straits. 

 Fishing grounds in Tremadoc Bay. 

 Staff and crew of Steamer " James Fletcher," and of By whom 



Bailiffs' sailing vessels ; 

 Naturalist working on board the steamer; 

 Chief Bailiffs on sailing vessels; 

 Assistant Naturalist at the Liverpool Laboratory. 



3. Fish-Marking Experiments. 



Investigation of migrations and growth of plaice Nature of 

 and flounders by marking experiments. Research. 



