Synopsis of Orders and Families. 



Okuek IV. Cormorants, Pelicans, Gannets, Man-o'war Birds, 

 ANo Tropic-Birds. STEGANOPODES. 



(6 families, 19 species, 5 subspecies.) 



Large birds, two feet or more in. length, varying; widely in appear- 

 ance and habits; in external structure agreeing- only in having all four 

 toes juined by webs. 



YELLOW-BILLED TROPIC BIRD. 



Family 9. TROPIC BIRDS. PHAtTHONTID^. 



Bill pointed, somewhat lern-hke; central tail feathers jnuch elongated; chin feathered. 



GANNET. 



Family lo. GANNETS. SULID/E. ! 



Bill stout, its tip not hooked; chin and eye space bare; tail pointed, its feathers hot. 

 'fluted.'' ' 



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