PLATE LI 



Fig. I. Thalassogeron culminatus. Rookery near Cape Pariadin. 



Fig. 2, Th. culminatus. Nest and egg. 



Fig. 3. Phoebetria palpehrata antarctica. Male crying to the female, making the shrill 

 expiratory note. 



Fig. 4. P. palpehrata antarctica. Nest and egg on a tussac-covered cliff ledge. 



