COLLAKED PETEEL 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. 



FEET. Dull yellow; distal portion of toes and webs, 

 black. 



IRIDES. Hazel-brown. 



AVERAGE MEASUREMENTS. 



TOTAL LENGTH ... ... ... 16 in. 



WING 11-3 



BEAK 1'75 



TARSO-METATAESUS ... 1'5 



COLLARED PETREL. (Estrelata brevipes (Peale). 

 Coloured Figures. Lilford, Coloured Figures,' vol. vi, pi. 63. 



A specimen of this Petrel, which is a native of the 

 Western Pacific, breeding on the Fiji 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. 0. 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 



