THE BIRDS OF HELIGOLAND 581 



definite data as to its occurrence and numbers can be given, as it 

 is apt to get lost among the crowds of the common species, both 

 during flight as well as on the cliff. In flying off from its breeding 

 -stations the bird is at once recognisable when seen from above by 

 the deeper slaty-black colour of the back, which in consequence 

 appears somewhat larger than in the common species, though in 

 general it is not so. In the course of the winter both old and 

 younger birds are shot pretty frequently, such specimens distinctly 

 displaying the white ring running round the eye, and prolonged 

 as a streak over the ear and down the sides of the head. 



This species is met with in larger or smaller numbers at all the 

 breeding stations of the common species. 



386. Brtinnich's Guillemot [DICKSCHNABEL-LUMME]. 

 URIA LOMVIA, Linn. 1 



Uria arra. Naumann, xii. 535. 



Brilnnich's Guillemot. Dresser, viii. 575. 



Guillemot a gros-bec, Temminck, Manuel, ii. 924, iv. 576. 



I have never either seen or obtained this bird in the whole 

 course of my long experience. Reymers, however, once shot an 

 example in winter plumage. The bird breeds in northern Green- 

 land, on Spitzbergen, Franz-Joseph Land, Nova Zembla, and the 

 islands of Arctic America. 



387. Black Guillemot [SCHWARZE LUMME]. 

 URIA GRYLLE, Cuv. 2 



Heligolandish : Rotjer. Name without further signification. 



Cepphus grylle. Naumann, xiL 461. 



Black Guillemot. Dresser, viii. 581. 



Guillemot a miroir blanc. Temminck, Manuel, ii. 925, iv. 577. 



In its simple but beautiful summer dress of velvety black, with 

 pure white patch on the wing, and the feet vermilion red, this bird 

 is of extremely rare occurrence here, and I have indeed only once 

 obtained it in this condition. Individuals in the process of moult- 

 ing to the breeding plumage have, however, occurred repeatedly. 



Young autumn birds are shot pretty frequently as early as 

 August, while old and younger birds in whiter plumage are killed 



1 Uria bniennichi (Sabine). 2 Uria grylle (Linn. ). 



