CONTENTS. 



PAGE 



Family Ibidida : Ibises 254 



Ardeidcs : Herons 259 



Gruidtz: Cranes 276 



Rallidcz : Rails and their Allies . . 279 



Anatida : Swans, Geese, and Ducks . 296 



Sulidcs : Gannets ..... 334 



Pelecanidcz: Pelicans 337 



Phalacrocoracidcz : Cormorants .... 339 



Tachypetidce : Frigates . . . . .341 



Laridce : Jaegers, Gulls, Terns, Skimmers, 343 



Procellariidcz : Petrels . . . . .330 



Colymbida : Loons 388 



Podicipedidce : Grebes 391 



Alcidcs : Auks 394 



