Order PR0CELLARIIF0RME8 
No. 101. 
Family PROCELLARIIDJS. 
PTERODROMA LESSONII LEUGOCEPHALA. 
EASTEEN WHITE-HEADED PETEEL. 
(Plate 85.)* 
Pbocellaria LEUGOCEPHALA Forster, Descr. Anim., ed. Licht., p. 206, 1844 ; Australian 
seas. 
Procellaria leucocephala Forster, Descr. Anim., ed, Licht., p. 206, 1844. 
ProceUaria lessoni Gould, Birds Austr., Vol. VII., pi. 49, 1848 ; Buller, Birds New Zeal., 
p. 303, pi. 29, 1873. 
^strelata leucocephala Gould, Handb. Birds Austr., Vol. II., p. 451, 1865. 
Pterodroma {JEstrelata) lessoni Ramsay, Proc. Linn. Soc. N.S.W., Vol. II., 1877, p. 202. 
(Estrelata lessoni BuUer, Birds New Zeal., 2nd ed., Vol. II., p. 219, 1888 ; Salvin, Cat. Birds 
Brit. Mus., Vol. XXV., p. 401, 1896 (pars) ; Hall, Key Birds Austr., p. 93, 1899 ; 
Campbell, Nests and Eggs Austr. Birds, p 904, 1901 ; Buller, Suppl. Birds New Zeal., 
Vol. I., p. Ill, 1905 ; Hall, Key Birds Austr., p. 93, 1906 ; Wilson, National Antarct. 
Exp., Aves, p. 87, 1907 ; Mathews, Handl. Birds Austral., p. 17, 1908 ; Godman, Monogr. 
Petrels, p. 181, 1908 ; Waite, Subant. Isl. New Zeal., Vol. I., p. 563, 1909 ; 
Littler, Handb. Birds Tasm., p. 175, 1910. 
Distribution. Seas of Austraha and New Zealand (Antipodes and Auckland Island, 
breeding). 
Adult male. General colour above pale grey, including the hind-neck, sides of neck, back, 
scapulars, and tail, darker on the wings and long scapulars ; lesser and median 
wing-coverts blackish hke those round the margin of the wing- and primary- coverts ; 
primary- quills blackish, paler on the inner webs ; secondaries slate-grey, white at 
the base ; feathers of the back and short scapulars grey with paler grey margins ; 
upper tail-coverts paler grey than the back, margined with white ; middle tail- 
feathers grey, the outer ones white-mottled or dusted with grey ; feathers round the 
eye blackish ; forehead, lores, and chin white, mottled with grey ; throat and 
remainder of under-surface white ; axillaries ash-grey, white at base and fringed 
with white at the tips ; under wing-coverts pale brown with whitish margins ; “ BiU 
black, iris black ; tarsi and base of feet fleshy white, toes and outer portion of webs 
black ” {Cat. Birds Brit. Mus.). Total length 413 mm. ; culmen 36, wing 314, tail 130, 
tarsus 48. ^ 
Adult female. Similar to the adult male ; wing 308. 
Nest. A large chamber at the end of a burrow. 
Egg. Clutch, one; pure white; axis 72mm., diameter 51. 
* The Plate is lettered (Estrelata lessoni. 
VOL. n. 
153 
