COLLARED PETREL 561 
Adult female nuptial.—Similar in plumage to the male. 
Adult winter, male and female.—Similar to the nuptial 
plumage. 
Immature, male and female.—‘‘The immature bird is 
believed to be mottled with brown on the forehead and 
to be duller in tint on the upper parts” (Saunders). 
Beak. Black. 
Fret. Dull yellow; distal portion of toes and webs, 
black. 
IriDEs. Hazel-brown. 
AVERAGE MEASUREMENTS. 
TORAL LENGDE ... a oe Gy 2 ame 
WING oe. ics. 
BEAK Fe AD) os 
'TTARSO-METATARSUS 1195) 
COLLARED PETREL. WJstrelata brevipes (Peale). 
Coloured Figures.—Lilford, ‘ Coloured Figures,’ vol. vi, pl. 63. 
A specimen of this Petrel, which is a native of the 
Western Pacific, breeding on the Fiyi Islands and New 
Hebrides and wandering over the Southern Oceans to 
almost the Antarctic ice-barrier, lat. 68° S., was taken 
between Borth and Aberystwith at the end of November or 
beginning of December, 1889. It was described by the late 
Mr. O. Salvin, who exhibited it at a meeting of the Linnean 
Society on November 6th, 1890 (‘ Ibis,’ 1891, pp. 411-414, 
with coloured plate). 
DESCRIPTIVE CHARACTERS. 
PLUMAGE. Adult male nuptial._—Top of head, slate-grey ; 
back, greyish; scapulars and wings, greyish with an admix- 
ture of brown; primaries, blackish; upper tail-coverts, 
grey; tail, blackish except the outer feathers which are 
shaded grey; forehead and throat, white; cheeks, mottled 
grey and white; a dark brown patch behind the eye; dark 
grey band across the upper breast, below which the breast 
and abdomen are light grey in some specimens, white in 
others; under wing-coverts and axillaries, white. 
36 
