EXPLANATION OF PLATE XXI. 



Fig. 1. Stebna fulioinosa, Gmelin. 

 Sooty Tern. 



Fig. 2. Angus stolidtts, Linnceus. 

 Noddy. 



Fig. 3. PuPFiNXTS NUOAX, Soland. 

 Allied Petrel. 



Fig.~ 4. Gyois CANDIDA, Omelin. 

 White Tern. 



Fig. 5. Anous melanogents, G. R. Gray. 

 Black-cheeked Noddy. 



Fig. 6. Anoijs cineeeus, Gould, 

 Grey Noddy. 



