MONOGRAPH OF THE PETRELS. 



in September (Gigl. and Salvad., Ibis, 1869, p. 63). Dr. Coppinger met with the species 

 on St. Ambrose Island on July 21st, 1879 (Sharpe, P. Z. S., 1881, p. 11), and a female 

 was obtained by Admiral Markham off the coast of Chile (Salvin, P. Z. 8., 1883, 

 p. 431). 



Nothing has been recorded of the habits of this bird beyond the statement of 

 Dr. Giglioli that its flight resembled that of a Prion. 



Adult. General colour above bluish-grey, with narrow hoary-white margins to 

 the feathers ; the longer scapulars black towards the ends ; wing-coverts black, the 

 greater series slaty-grey on the outer webs ; bastard-wing, primary-coverts, and quills 

 black, the last white on the inner webs, the secondaries externally ashy-grey, like 

 the greater coverts, and fringed with white like the latter ; the innermost secondaries 

 rather blacker, resembling the longer scapulars ; on the centre of the rump a small 

 patch of blackish feathers ; upper tail-coverts bluish-grey, fringed with white at the 

 tips ; tail-feathers ashy-brown, the outermost white, freckled with ashy-brown on 

 the inner web, the penultimate white on the outer web, freckled with ashy-brown ; 

 the third feather for the most part ashy-brown, but with a few white frecklings ; crown 

 of head bluish-grey, like the back, and with similar white fringes to the feathers ; 

 forehead and lores pure white, the former slightly spotted posteriorly with blackish 

 bases to the feathers ; feathers round the eye blackish, with a narrow streak of white 

 above the latter ; sides of face, cheeks, and entire under-surface of body pure white, 

 including the thighs and under tail-coverts ; on the sides of the fore-neck a patch of 

 bluish-grey feathers, like the back, and similarly fringed with white ; axillaries and 

 under wing-coverts white, excepting for a black band round the entire bend of the 

 wing, broken up here and there with white ; lower primary-cOverts pure white ; quills 

 blackish below, the inner web white for its inner half to within a short distance of the 

 tip ; " bill black ; tarsi pale blue ; toes black, the webs yellow, dusky towards the 

 ends ; iris brown " (H. H. Giglioli). Total length about 10.0 inches ; culmen, 1.15 ; 

 wing, 9.0 ; tail, 3.2 ; tarsus, 1.15 ; middle toe and claw, 1.5. 



Dr. Coppinger describes the tarsi as of a " lavender-colour." 



The dimensions in the series in the British Museum are as follows : — 



Female. 



9.05—9.1 



•• •• •• X*X 



1.4—1.45 



The description and figure are taken from a specimen in our collection received 

 in exchange from the Turin Museum, and one of the co-types of the species. It is 

 labelled " Tipo," and is from Valparaiso. 





Male. 



Wing 



8.85—9.4 



Culmen 



1.15 



Middle toe and claw 



1.4—1.45 



246 



