Synopsis of Orders and Families. 



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

 and 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 joined by webs. 



yellow-billed tropic bird. 



Family 9. TROPIC BIRDS. PHAETHONTID^E. 



Bill pointed, somewhat tern-like; central tail feathers much elongated; chin feathered.. 



GANNET. 



Family io. GANNETS. SULID/E. 



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

 'fluted.' 



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