332 BRITISH BIRDS. 



upperparts Its thicker, slightly shorter, and differently- 

 shaped beak was quite distinct from that of the Common 

 Guillemot I could distinctly see (through my field- 

 glasses) the white line along the edge of the basal half of 

 the upper mandible" (H. B. Booth, Nat, 1908, p. 289).] 



BLACK GUILLEMOT Uria grylle (L.). S. page 703. 



Cornwall. — One was picked up dead near the St. Anthony 

 Lighthouse, Falmouth, on March 12th, 1905, during very 

 stormy weather. One of the rarest casuals in Cornwall 

 (J. Clark, Zool, 1907, p. 287). 



Norfolk. — Two were seen near Wells by Mr. C. Hamond, 

 on January 8th, 1898 (J. H. Gurney, t.c, 1899, p. 118). 



LITTLE AUK Mergulus alle (L.). S. page 705. 



A great irruption of Little Auks occurred during February 

 and March, 1900, when numbers were washed up chiefly on 

 the Norfolk coast, and many in Suffolk. Compared to the 

 " invasion " in 1895 there were more if anything on this coast 

 in 1900, but " the incursion expended itself in a space of 

 about fifty miles extending from the Wash to Lowestoft, 

 and reaching its maximum at Cley." Not so many were found 

 inland as in 1895, and although the numbers were large, 

 there appeared to be fewer on the Yorkshire and Lincolnshire 

 coasts. Norfolk appears to have recorded five great irruptions 

 of this bird, viz., October, 1841 (probably the greatest) ; 

 December, 1848 ; November, 1861 ; January, 1895 ; 

 February, 1900 (J. H. Gurney, Zool, 1901, pp. 124-126 ; c/. also 

 T. H. Nelson, Birds of Yorks., p. 731). One bird recorded 

 " about mid-winter, 1900," on St. Agnes, Scilly Isles (J. Clark 

 and F. R. Rodd, t.c, 1906, p. 345), perhaps was a straggler 

 from this horde. On January 4th, 1900, a great number 

 were reported from North Uist, and in February many along 

 the Aberdeen coast and several in the Forth area {Ann. 

 S.N.H., 1901, p. 144). In the latter half of February, 1901, 

 also over fifty were reported on the Norfolk coast (J. H. 

 Gurney, Zool, 1902, p. 87). 



WHITE-BILLED NORTHERN DIVER Colymbus adamsi 

 G. R. Gray. S. page 711. 



[On December 31st, 1901, a Diver with the whole of lower 

 and about two-thirds of upper mandibles white, was picked 

 up at Caister, Norfolk, but Mr. Gurney does not think the 

 bill was sufficiently upturned for this species. Nor does he 



