778 SYSTEMA TIC SYNOPSIS. —LON GIPENNES. — TUBINAUES. 
Atlantic, swarming at some of its favorite breeding places, especially St. Kilda, wide ranging at 
other seasons ; S. to U. S. in winter. Nest on crags over the sea ; egg single, white, with 
rough brittle shell, resembling a hen's egg in size and shape ; young covered with whitish 
down ; fed in the nest by regurgitation of an oily fluid. The fulmars are very greedy of fatty 
substances, and constantly attend the whale-fishery to feed upon the blubber. 
815. F. g. pacrficus. (Lat. pacificus, pacific.) Pacific Fulmar. Averaging darker than No. 
814, the mantle bluish-cinereous rather than pale pearly-blue ; the bill rather weaker and 
less strongly hooked. N. Pacific, in vast numbers. Changes of plumage, habits, etc., the 
same as those of the common species. 
816. F. g. rod'gersi. (To Comm. John Rodgers, U. S. N.) Rodgers' Fulmar. The mantle 
dark, as in pacificus, but much restricted, most of the wing-coverts and inner quills being 
white ; primaries mostly white on inner webs, their shafts yellow. Size and shape as before. 
N. Pacific, swarming on some of the rocky islands in Beh ring's sea. Nest on the crags ; 
single egg white, nearly equal-ended, rough with innumerable pits and points, 2.90 X 1.90; 
chick hatches like a puJff-ball of white down. 
322. PRIOCEL'LA. (Prion -\- Procella.) Gull Fulmars. Character of Fulma/rus proper; 
bill little shorter than head or tarsus, about | the middle toe and claw, compressed, higher 
than broad at base, not very robust, sides regularly tapering to rather narrow tip ; grooves 
not so well marked as usual ; hook moderate ; commissure a little curved ; outlines of inferior 
mandibular rami and gonys both slightly concave ; nasal tube i— f the culmen, depressed at 
base, high and narrow at end. Feet, wings, and tail as in Fulmarus. Two species ; ours 
curiously resembling a gull. 
817. P. tenuiros'tris. (Lat. tenuirostris, slender-billed. Fig. 524.) Slender-billed Fulmar. 
Adult ^ 9 • Plumage white, with clear pearly-blue mantle, and black primaries, just like a 
gull ; the mantle beginning faintly on the nape, continuing over w^hole back, rump, tail, wing- 
coverts and inner quills ; edge of the wing slaty-gray ; primaries black, their shafts yellowish- 
white at base, their inner webs pearly-white to near the ends ; white of first primary extending 
to Mnthin two inches of the tip, further on the rest successively, reaching the end on the 6th; 
outer webs of secondaries slaty-black, inner white ; a small dusky spot before eye ; a faint 
pearly shade on sides of breast and body. Bill and feet (dry) yellow ; nasal tube and hook 
obscured with bluish horn-color. Length about 18.50: extent about 36.00; wing 13.00; 
tail 5.25; tarsus 2.00; middle toe and claw 2.60; outer do. 2.70; inner do. 2.25; chord of 
Fig. 524. —Slender-billed Fulmar, nat. size. (From Elliot.) 
