EXPLANATION OF PLATE B. XXIU. 



Fig. 1. GABIANUS PACIFICUS. 



Pacific Gull. 



Fig. 2, 3. H.EMATOPUS UNICOLOR. 



Sooty Oyster-Catcher. 



Fig, 4. Ph.uthon bubricauda. 



Red-tailed Tropic-Bird. 



Fig. 5, 6. H^MATOPDS LONGIROSTRIS. 



White-breasted Oyster-Catcher. 



Fig. 7. Htdroprogne caspia. 

 Caspian Tern. 



Fig. 8, 9. Sterna beroii. 



Crested Tern. 



