PLATE X 



Fig. I. Pygoscelis antarctica and chicks. Sandefjord Bay, Coronation 

 Islands, lo. i. 33. The chicks are only about two days old and the nest 

 is still almost intact. 



Fig. 2. Pygoscelis antarctica climbing to their nests on a steep slope in 

 Sandefjord Bay. The rock here does not always afford good foothold 

 and very great difficulty is experienced by the birds in landing and 

 climbing to their nests in this and similar situations. 



