BRITISH BIRDS. 
63 
Sp. 2. C. Bewickii. Yarrell. 
Syn. Cygnus Bewickii, Yarr . Linn. Trans. Bewick’s Swan, Yarr. 
Eyton. 
ADDENDA. 
GENUS Syrnium. 
Sp. 2. S. Tengmalmi. Linnaeus. 
Syn. Strix Tengmalmi, Linn. Temm. Vieill. Faun. Bo. Amer. Teng- 
malm’s Owl, Eyton , Addenda. 
GENUS Turdus. 
Sp. 1 . T. Whitei. Nohis. 
Syn. White’s Thrush, Eyton, Addenda. 
CATALOGUE 
OF 
Extinct Species. 
GENUS Tetrao. 
Sp. T. Urogallus. Linnaeus. 
Syn. Tetrao Urogallus, Gmel. Lath. Tetras Auerhan, Temm. Wood 
Grouse, English Authors . 
Sp. T. Medius. Meyer. 
Syn. Tetrao Hybridus, Sparm. Tetras Rakkelhan, Temm. 
