OF THE BRITISH ISLANDS. 461 



the head and upper neck black, ornamented with a very conspicuous 

 crest, white margined with black, and with two black crescentic 

 marks on each side of the breast (adult male) ; with the head 

 (crested) and upper neck uniform brown, and the underparts 

 below the neck uniform white (adult female). Length, 17 to 19 

 inches. 



