99 [Vol. xxxiii. 



Islands. I need hardly remark that it is essential in 

 measuring Dunlins always to compare birds of the same sex, 

 for the female, on the average, is the larger bird in all its 

 measurements ; though, if both forms are taken together, 

 there is considerable overlapping. 



"A point which I have noted in my experience, but which 

 requires the confirmation of other observers, is that on the 

 east and south coasts, at any rate, although both forms are 

 common enough in autumn, the larger-billed form is much 

 the commoner in winter, and flocks apparently of the long- 

 billed race arrive on our east coasts in winter in hard 

 weather only. 



" As to whether T. schinzi is a good race or not I must 

 leave undecided for the present, as I have not been able to 

 examine a large enough series of breeding birds from 

 different areas, but I give the measurements of the bills 

 of those I have examined for the information of future 

 workers. 



"British (breeding). 



$ . 25-31 mm. ; av. 27*8 (12 specimens). 

 $ . 28'o-33"5 mm. ; av. 30*6 (8 specimens). 



"Norwegian (Vads0 neighbourhood, breeding). 



S . 29-30 mm. ; av. 29*5 (4 specimens). 

 ? . 32-33*5 mm. ; av. 33 - l (5 specimens). 



" West Siberian (Petchora and Yenesei, breeding). 



S . 29-34 mm. ; av. 30*5 (7 specimens). 

 ? . 30-35*5 mm.; av. 332 (4 specimens). 



" Rilgen I., Baltic (breeding ; topo-types of 

 T. schinzi from the Brehm coll.). 



<J . 28-5 mm. ; S • 30 mm. ; ? . 28 mm. 



"It will be noted that the British breeding birds are 

 indistinguishable from the Riigen I. birds, and that while 



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