SYNOPSIS OF ORDERS AND FAMILIES. 
ORDER IV. CORMORANTS, PELICANS, GANNETS, MAN-O’WAR BIRDS, - 
AND Tropic-Birps. 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. PHAETHONTIDA. 
Bill pointed, somewhat tern-like; central tail feathers much elongated; chin feathered. 
ei . 
\ Wat. Size. 
GANNET. 
Family 10. GANNETS. SULIDA. 
Bill stout, its tip not hooked; chin and eye space bare; tail pointed, its feathers not 
“fluted.’ 
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