302 
BURNIA. 
disk small, and placed with a more lateral inclina- 
tion ; the plumage more rigid, and the wings 
formed for pursuing flight. Birds hunt by day as 
well as during the twilight. 
StJRNiA, generic characters. — Bill short hut 
strong, slightly sinuated, and compressed up- 
wards at the base ; nostrils oval, and placed 
obliquely; disk small, retracting laterally; 
ruff nearly wanting ; conchal opening small ; 
no operculum ; wings of mean length, rigid, 
third* quill longest, three or four first deeply 
notched ; legs and toes muscular, thickly 
clothed with long plumes, having cetaceous 
webs ; claws long, sharp, much incurved and 
slender towards the tips ; plumage rigid. 
