542 PROCELLARITDAG 
Adult winter, male and female.—Similar to the nuptial 
plumage. 
Immature, male and female.— Kesembles the nuptial 
phiunage. 
Nestling.—‘‘ The nestling being covered with long greyish- 
brown down, resembles a small long-haired mouse rather 
than a bird, as neither the wings nor the bill are visible” 
(Saunders). 
Brak. Black. 
FEET. Brownish-black. 
Irn1pES. Dark brown. 
AYERAGE MEASUREMENTS. 
TOTAL LENGTH ... ci one OUD 
WING Sad fe as i he ee 
BEAK a Bae no, OHMS: 
T'ARSO-METATARSUS es sae ORD 
Kae ib ee ¢ Oininae 
MADEIRAN FORKED-TAILED PETREL. Oceanodroma castro 
(Harcourt). 
Coloured Figures.—Dresser, ‘ Birds of Europe,’ vol. ix, pl. 718; 
Lilford, ‘ Coloured Figures,’ vol. vi, pl. 55. 
There is but one British specimen of this Southern 
Petrel on record, namely a bird picked up dead on the 
strand at Littlestone, in Kent, on December 5th, 1895. It 
is in the possession of Mr. Boyd Alexander, who examined it 
in the flesh. This specimen was exhibited before a meet- 
ing of the British Ornithologists’ Club on April 29th, 1896 
(Saunders, Man. Brit. Birds, 2nd Edit., p. 731; also ‘ Ibis,’ 
1896, p. 401). 
_ DESCRIPTIVE CHARACTERS. 
PLUMAGE. Adult male nuptial—This species may be 
distinguished from Leach’s Petrel, which it resembles in 
colour, by its tail, which is much less forked ; longer upper 
tail-coverts, white, broadly edged with black; tail-feathers 
(except the central pair), black, with white bases. 
Adult female nuptial.—Similar in plumage to the male. 
