-( 2 )- 
27. Sclater, P. L: — List of the certainly known Species of Anatidce. 1880. 
28- Stevenson: — The Mute Swan on the rivers and broads of Norfolk with notes <>n 
the Polish Swan of Yarrell (Oygnus immutabilis). 18(36. 
29. Taczanowski, M. L : — On the Birds of Corea (Liste supplementaire des Oiseaux 
recueillis en Coree par M. Jean Kalinowski). 1888. 
30. The Living Animals of the World. Vol. II. 
31. Uchida, S :— A Hand-List of Formosan Birds. 1912. 
