326 PROCELLARIIDZ, PETRELS. 
paratively small and weak; the horny piece forming the culmen very broad, 
especially at base, where it overlaps the lateral piece; depth of bill at base 
13, its width there 14. Tail contained about 3 times in the wing. General 
dimensions of the last species, or rather less; tail longer. Adult plumage 
dark brown, paler and grayer, or rather plumbeous below, lightening or 
even whitening about the head; quills black with yellow shafts; bill dark ; 
feet black. A final plumage may be lighter than as described, but is never 
white; and other characters seem to prove the validity of the species. 
Pacific Coast, very abundant. Avp., vii, 198; Scuurcen, M. P.-B., Pro- 
cellarie, 33; SWINHOE, Ibis, 1863, 431; Cours, Proc. Phila. Acad. 1866, 
178 3"Cass:, M1Fs2KO% 
pl. 35. D. gibbosa 
GOULD? . NIGRIPES. 
** Sides of under 
mandible with a long 
colored groove; bill 
comparatively slender, 
strongly compressed, 
with sharp culmen; 
frontal feathers forming 
a deep reéntrance on 
the culmen, a strong 
salience on the sides of 
Wing about twice as 
long as the cuneate 
tail. (Pheebetria.) 
Sooty Albatross. Fuliginous brown, nearly uniform, in some cases lighten- 
ing on various parts; quills and tail blackish with white shafts; eyelids 
white; bill black, the groove yellow; feet yellow. Length about 3 feet ; 
wing 20-22 inches ; tail 10-11, its graduation 383—4$; tarsi 3; bill 4-43, at 
base 14 deep, but only $ wide. D. fusca Aup., vii, 200, pl. 454; D. fuli- 
ginosa Lawn. in Bp., 823; Phoebetria fuliginosa Couns, 1. c. 186. FULIGINOSA. 
Fic. 208. Sooty Albatross. 
Subfamily PROCELLARIINA. Petrels. 
Nostrils united in one double-barrelled tube laid horizontally on the culmen at~ 
base. Hallux present, though it may be minute. Five groups of petrels may be 
distinguished, although they grade into each other; four of them are abundantly 
represented on our coasts. The fulmurs are large gull-like species (one of them 
might be taken for a gull were it not for the nostrils), usually white with a darker 
mantle, the tail large, well formed (of 14-16 feathers), the nasal case prominent, 
with a thin partition. They shade into the group of which the genus Zstrelata is 
typical, embracing a large number of medium sized species, chiefly of Southern 
seas, in which the bill is short, stout, very strongly hooked, with prominent nasal 
case ; the tail rather long, usually graduated. The shearwaters have the bill longer 
than usual, comparatively slender, with short low nasal case, obliquely truncate at 
the end, and the partition between the nostrils thick; the tail short and rounded; 
the lower mandible. - 
iinet 
