ALCIDZ 37 
298. STERCORARIUS POMATORHINUS (Temm.). Pomatorhine Skua. 
Migrates at a considerable distance out at sea, and, as a rule, does not 
approach the shore. Numerous, both mature and young, in 1879 on the 
coast, and again July to October, 1881, numbers at sea. Both the dark 
and light forms have been shot within the Humber. An adult was 
shot at the Spurn in 1887 on Whit Monday. 
299. STERCORARIUS CREPIDATUS (Gmel.). Arctic Skua. 
The most commonly met with of any of the skuas, and in August, 
September and October often very plentiful along the coast. An extra- 
ordinary immigration in 1879, and again 1885, 1886 and 1895, which 
were all great skua years. In 1896, on October 8th, at Flamborough, 
hundreds of flocks of kittiwake were seen going south with flocks of skua 
following. 
300. STERCORARIUS PARASITICUS (Linn.). Long-tailed Skua. 
Much less frequent than the two preceding species. In 1879 many, 
both mature and immature, occurred near the coast, but in no year since 
this in such like numbers. Why in this particular year the skuas chose 
to pass south so near the land has not been found out. It may be that 
they followed flights of gulls, which themselves followed shoals of fish 
moving inshore. 
Order ALC A. Family ALCID A. 
801. Atca torpA, Linn. Razorbill. 
Breeds in very considerable numbers in the Flamborough cliffs, 
arriving off the rocks early in March, and in 1884 in February—an un- 
precedented circumstance there. Old and young go out to sea in July 
and August. Are seldom seen swimming inshore during the winter 
months. 
802. Uria TROILE (Linn.). Guillemot. 
Breeding in vast numbers on the Flamborough cliffs, where they 
arrive from the sea for good late in March or early April, immense 
numbers appearing on the water in February off the Headland. Commence 
leaving in July with the young, and are to be found all over the North 
Sea in winter. North-east winds retard the laying of eggs, and keep the 
birds from the cliffs. Probably 130,000 eggs, chiefly of guillemot, are 
taken at Flamborough in the season. Pure white varieties of the bird 
have been obtained in 1881, 1885, 1887 and 1899. 
303. UriA BRUENNICHI (KE. Sabine). Briinnich’s Gwillemot. 
One, an adult male, was obtained on the North Bay, Scarborough, on 
January 7th, 1895; another, also a male, at Filey on January 30th, and 
a third, a female, at Filey, about the same time. Two were sent to 
Lord Lilford, and plate 40, vol. vi., in ‘ Birds of the British Islands,’ is 
taken from the Yorkshire birds. 
304, UriA GRYLLE (Linn.). Black Gwillemot. 
Not uncommon off the coast in the autumn and winter, especially 
about Flamborough Head, where it is also seen in the summer. At least 
two pairs were breeding there in 1896 and 1897. 
