PROCELLARUDZA: PETRELS. 773 
shorter and less deeply emarginate. Legs and fect dull light reddish. Entire upper parts 
arather light grayish-brown, deepest on the wing-coverts and tertials; each feather with 
a tolerably broad margin and tip of white, broadest and most conspicuous on the wing-coverts 
and tertials. Forehead, sides of the head below the eyes, the neck all round, the edge of 
the fore-arm, inferior surfaces of the wings, and whole under parts, white. Primaries almost 
exactly as in the adults, except that the innermost have more white, and there is a slight 
white terminal margin as far as the fourth or fifth. Secondaries about as in the adults, but 
their brown portions lighter and duller. Tail white; the greater part of the two central 
rectrices, and the inner webs of the others, with a tinge of dull grayish-brown, deepest on 
the middle pair. 8S. Atlantic and Gulf States, strictly maritime, abundant; casually N. to 
New England. Nesting like that of terns, in communities; eggs dropped on the sand, 
3 in number, pure white, spotted and splashed with dark browns and blackish, and pale 
neutral-tint. 
20. SuBsorpER TUBINARES: TusBE-Nosep LONGWINGS. 
Character and definition of this group the same as of the single 
60. Family PROCELLARIIDA: Petrels. 
Nostrils tubular. 
Bill epignathous ; its 
covering —_ discontin- 
uous, consisting of 
several horny pieces 
separated by deep 
grooves. Hallux 
small, elevated, func- 
tionless, appearing 
merely as a sessile 
claw, often minute, or 
absent. 
These are oceanic 
birds, rarely landing 
except to breed, un- 
surpassed in powers 
of flight, and usually 
strong swimmers. Ex- 
cepting the Sea-run- 
ners (Halodromine), 
none of them dive. 
With the same excep- 
tion, the wings are 
long, stroug, and 
pointed, of 10. stiff 
primaries and numer- 
ous short secondaries ; 
the humeral and anti- 
brachial portions are sometimes extremely lengthened. The tail is short or moderate, of less 
than 20 feathers, variable in shape. The feet are usually short, with long full-webbed frout 
toes, and a rudimentary hallux, or none. In size, these birds vary remarkably, ranging frow 
Fig. 521.— Nest of the Fulmar. (Designed by H. W. Elliot.) 
