— 70 — 



of the operations from the Board's motor boat "Enid" in the waters of the Inver- 

 ness Firth during the winter months. The lengths of all those were obtained, while 

 1.100 otoliths have been examined. It was hoped that this sample would be repres- 

 entative of the very earliest year-groups, but the results so far appear to indicate 

 that the growth rate in this area is extremely slow. 



No further marking experiments were made during the period and the 

 records of the 1920 experiments are now being dealt with. 



Scotland. Lemon Sole. Investigations into the rate of growth of the Lemon 

 Sole have been continued. A number of fish have been marked and liberated, a 

 scale being taken from the fish before liberation. Data is thus being obtained which 

 will be of considerable interest to the question of age determination by means 

 of scale rings. 



Holland. The examination of the stomach contents of young plaice from 

 the Texel-shore has been continued in order to study the variations in the food 

 supply from year to year. 



Sweden. Marking experiments on plaice in the Swedish fiords have been 

 made in order to ascertain the life conditions of this species of fish in inshore waters. 

 The result is : that the plaice in the fiords of Skagerak and Kattegat grows rapidly 

 up to a size of 28 — 32 cm. length and then emigrates from our fiords when ripe for 

 spawning. One of the marked plaice has been caught in the North Sea at the Frisian 

 coast. This is probably the greatest distance covered by a marked plaice hitherto 

 known. 



h. The Committee of the Atlantic Slope. 



France has worked out a special report. 



England. The English share of the programme was carried out by the staff 

 of the Marine Biological Association of the United Kingdom, as follows: 



Hydrographical stations worked in connection with programme of Atlantic 

 Slope Committee from April 1921 to July 1922. 



1921. April 26 Stations E 1. 



May 26 and 27 — El, LI to L6. 



July 2 to 4 — El, E2, E3, Nl, N2, E7. 



August 12 — E 1, L 1 to L 5. 



— 15 — El, LI to L5. 



— 16 — El. 



— 22 and 23 — L 1 to L 3 and six additional stations 



towards Falmouth. 

 September 1 — L 1 to L 5. 



