Lestris pomerina in its manners.” The egg, as figured by
Thienemann, is of a pale green colour, spotted with ash-grey
and dark reddish-brown; the measurements are two inchl|g
in length, by one inch and five lines in breadth.
In the adult bird the base of the bill, including the cere,
is dark greenish-brown, the. horny, curved point black ; irides
brown; all the upper part of the head black; sides and back
of the neck white, tinged with straw yellow'; back, tertials,
wing, and tail-coverts brownish-grey; primaries and tail-
feathers almost black ; chin, throat, and upper part of belly
white; lower part of the belly;-the vent, and under tail-covêrts
light brownish-grey; legs, toes, and their membranes black; the
tarsi still bearing some' traces of their previous yellow colour.
The whole length of the specimen, described from the
point of the beak to the end of the tail-feather next the
central pair, thirteen inches and a half, the '.Central feathers
extending nine| inches beyond; thé wing, from the anterior
bend to the end Jof the Jongestr quill-feather, -.twelve’inches
the tarsus oné inch and a h alf; the middle toe and the claw
rather shorter, ór one inch and three eighths.
Independently of the difference' in measurements, adult
birds of this species, compared with old ones of-the species
previously described, have the head always much darker in
colour, while the back is lighter. ®
The fifth European species of Lestris which I have referred
to, is that noticed by Dr. Richardson in his Fauna Boreali-
Americana, page 43$, under the name Stercorarius cepphus
of Leach. Two examples from Hecla Bay and Spitzbergen
are in the collection at the British Museum, and I possess
one brought home from the Greenland seas. It has not been
taken in England, that I am aware o f; but, though closely
resembling Richardson’s Skua in size and colour of plumage,
is at once to be distinguished by the great comparative
breadth of the bill at its base.
NAT AT ORES. LARIDÆ.
T H E FULMAR P E T R E L .
Erocellarid glacialis, Fulmar Petrel, ' Penn. Brit. Zool. vol. ii. p. 203.
,, The Fulmar, Mont, Ornith. Diet.
„ » >> B®WWk, Brit. Birds, vol. ii. p. 256.
„ ,, Fulmar Petrel, Flem. Brit. An. p. 135.
■ ,, Selby, Brit. Ornith. vol. ii. p. 523.
Nor the fn Fulmar,! euyns, Brit. Vert. p. 284.
„ ,, Fulmar Petrel', Gould, Birds of Europe, pt. iv.
- Petrel Fulmdr^ Terjm. Man. d’Ornith, vol. ii. p. 802.
,, H ,, ,, ,, ,, ,, vol. iv. p. 505.
P kocellaria. ‘ Generic Characters.—Beak not so long as the head; the
upper mandible composed of four portions, divided by lines, orindentations ;
the whole together large and strong, curving suddenly towards the point;
the under mandible grooved along each side, bent at the end, with a prominent
angle beneath; the edges of both mandibles sharp and cutting; those
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