636 
PYGOPODES. 
Uria. 
Uria, Brisson, Orn. vi. p. 70 (1760). 
3097. Uria troile. 
Colymbus troile , Linn. Syst. Nat. i. p. 220. 
Alca troile , Dresser, B. Eur. viii. p. 567, pi. 621. 
a, — b, — c Yorkshire (. Arthur Strickland ) 1830. — d York- 
shire, March (. H \ E. Strickland) 1833. — e Tenby, August (H. E. 
Strickland) 1835. 
3098. Uria bruennichi. 
Uria brunnichi, Sabine, Trans. L. S. xii. p. 538. 
Alca bruennichi , Dresser, B. Eur. viii. p. 575, pi. 622. 
a ( Thomas ) 1842. 
A species of the Arctic Oceans. 
Cepphus. 
Cepphus , Pallas, Spic. Zool. v. p. 33 (1769). 
3099. Cepphus grylle. 
Colymbus grylle , Linn. Syst. Nat. i. p. 220. 
Uria grylle , Dresser, B. Eur. viii. p. 581, pi. 623. 
a Yorkshire (. Arthur Strickland) 1833. — b f Orkney, 
August (H. E. Strickland) 1837. — c I. of Skye, 19 August 
(H. E. Strickland) 1837. 
Mergulus. 
Mergulus, Vieillot, Anal. p. 67 (1816). 
3100. Mergulus alle. 
Alca alle, Linn. Syst. Nat. i. p. 211. 
Mergulus alle, Dresser, B. Eur. viii. p. 591, pi. 624. 
Mergulus melanoleucos, Leach, Syst. Cat. Mamm. & Birds 
Brit. Mus. p. 42. 
a ( Arthur Strdckland) 1833. 
A species of the North- Atlantic Ocean. 
