107 



the coasts of Western Europe. An adult bird in 

 summer plumage, with fine black head, was killed 

 on the Shannon, in Ireland, the only specimen in that 

 state of plumage obtained in the British Islands. 

 Professor Nilson says that this species is a summer 

 visitor to the marshes in the vicinity of the Baltic 

 and Gothland, where, it breeds, but he has never 

 seen the eggs. It is also said to be found in 

 Germany, Holland, Eussia, Siberia, &c. 



GULL, MASKED. 



LAEUS CAPISTKATUS, Temm. 



Two specimens of this bird, a male and a female, 

 from Orkney, were in Mr. Bullock's collection 5 

 and another, from Shetland, was presented in 1831 

 to the Zoological Society of London. In March, 

 1833, one was shot near Belfast, and two others 

 have been mentioned as having been either cap- 

 tured or shot. This bird, first described as a 

 species by Temminck, is said to be smaller than 

 the common Black-headed Gull, with shorter and 

 more slender bill, and shorter legs. 



GULL, POMARINE SKUA. 



LESTRIS POMARINTJS, Temm. 



This species, which is smaller than the Common 

 Skua, breeds in the Arctic regions, and appears 



