ILLUSTRATIONS. 



(Photographs by Worcester and Cortez. ) 



Plate I. 



Brown booby; Sula leucogastra ( Boddaert ) . 



Plate II. 



Fig. 1. Female brown booby with two large chicks. Maeander Reef. 

 2. Brown booby with nest and egg. Bankoran Island. 



Plate III. 



Fig. 1. Nest and egg of red-legged booby, Sula piscator (Linnteus). Bancoran 

 Island. 

 2. Eed-legged boobies nesting. Bankoran Island. 



Plate IV. 



Fig. 1. Sooty terns, Sterna fuscata (Linnoeus). Maeander Reef. 

 2. Group of sooty terns nesting. Maeander Reef. 



Plate V. 



Fig. 1. Northern Bergius's terns, Sterna boreotis Bangs, nesting. A sooty tern 

 in the foreground. Maeander Reef. 

 2. Eggs and young of northen Berguis's tern. Maeander Reef. 



Plate VI. 



Fig. 1. Boobies on Usong Island. Tub-bataha Reef. 



2. A group of sooty terns, chiefly immature. Boobies in the background. 



Fig. 1. Young of Micranons worcesteri McGregor, sp. nov. in nest. 

 2. Bankoran Island from the north. 



Plate VIII. 



Sula cyanops (Sundev.). Usong Island, Tub-bataha Reef. 



