BIRDS. 
Puate X. 
The feet of the Adélie Penguin (Pygoscelis adeliw) at various ages. Figs. 1 and 2 
are of corresponding age to fig. 1, Pl. IX.; fig. 3, of corresponding age to fig. 2, 
Pl. [X.; figs. 4 and 5, the normal foot of the adult; and fig. 6, an abnormal 
distribution of colour in the foot of an adult. 
