BIRD-MARKING IN THE NETHERLANDS, 57 
The herring-gulls bred in the Netherlands seem to visit 
the coast of S. B, England. 
Larus ridibundus, marked at Ellemeet on Schouwen, 
prov. Zeeland, by Mr. A. Man in ’t Veld. 
Ring 666, marked 18 June 1911, found dead 29 October 
1911 along the Nieuwe Merwede, province Zuid-Holland. 
Reporter Mr. W. Boot, Dordrecht. 
Ring 720, marked 25 June 1911, shot 9 August 1911 
at Palavas-les-Flots, dep. Hérault, Southern France. Re- 
porter Mr. M. Granier. 
Ring 754, marked 25 June 1911, shot 14 September 
1911 at Saint Brévin-]’Océan, dep. Loire inf., Northwestern 
France. Reporter Mr. Paul Vial. 
Ring 792, marked 25 June 1911, shot 7 August 1911 
in the Baie de la Seine, Northwestern France. Reporter 
Dr. A. Loir, Havre. 
Ring 796, marked 25 June 1911, found dead 29 October 
1911 at Campozancos, on the river Minho, prov. Pontevedra, 
Northwestern Spain. Reporter Mr. Luis. A. Mestre, Vigo. 
Ring 2248, marked 2 July 1911, found dead 25 August 
1911 at Brussels. Reporter Mr. A. Ramaeckers. 
Ring 2630, marked 2 July 1911, shot 5 November 1911 
in the Baie de la Somme. Reporter Mr. L. Malijieue, Le Crotoy. 
Very interesting is the case of ring n°. 720. This black- 
headed gull was marked, as young bird, at 25 June 1911 
in Holland and already at 9 August 1911 it was shot at 
Palavas-les-Flots in the south of France at the Mediterranean. 
Some of these gulls seem to migrate already soon after 
maturity far southward. They seem to follow not only the sea- . 
coast, but also the great rivers, as is proved by the results, 
achieved by the Bird Observatory at Rossitten in Germany. 
Sterna cantiaca, marked at Kerkwerve on Schouwen, 
prov. Zeeland, by Mr. A. Man in ’t Veld. 
Ring 984, marked 18 June 1911, shot 24 August 1911 
on the Chausey Islands near Granville, Northwestern France. 
Reporter Mr. A. Lemaréchal, Paris. 
Notes from the Leyden Museum, Vol. XXXIV. 
