PBOCELLARIID^ : PETRELS. 
773 
ehorter and less deeply einarginate. Legs and feet dull light reddish. Entire upper parts 
a rather 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. S. 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. Suborder TUBINARES : Tube-nosed Longwings. 
Character and definition of this group the same as of the single 
60. Family PROCELLARIID^ : Petrels. 
Nostrils tubular. 
Bill epignathous ; its 
covering discontin- 
uous, consisting of 
several homy 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 fiight, and usually 
strong swimmers. Ex- 
cepting the Sea-run- 
ners (Halodi'omince) , 
none of them dive. 
With the same excep- 
tion, the wings are 
long, strong, and 
pointed, of 10 stiflF 
primaries and numer- 
ous short secondaries; 
Fig. 521. - Nest of the Fulmar. (Designed by H. W. Elliot.) 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 front 
toes, and a rudimentary hallux, or none. In size, these birds vary remarkably, ranging from 
