MONOGRAPH OF THE PETRELS. 



cheeks, and throat ; under tail-coverts slaty-grey ; under wing-coverts dull slate-colour, 

 with blackish shafts and hoary margins to the feathers ; primary-coverts and quills 

 below slaty-grey ; axillaries slaty-grey, with narrow white fringes at the tips ; " bill 

 black ; feet purplish-grey ; claws black ; iris dark brown, with a blue-black pupil " 

 (Dr. Pirie). Total length about 13.0 inches ; culmen, 1.0 ; wing, 10.1 ; tail, 3.6 ; tarsus, 

 1.4 ; middle toe and claw, 1.8. 



Nikolai Hanson recorded the following colours for the species : — ■" Bill grey ; feet 

 and webs black ; iris dark brown." The nestling is clothed in sooty-brown down, 

 and the underlying plumage is similar to that of the adult bird. 



The specimen described was obtained by the Antarctic Expedition in Kerguelen 

 Island, and the bird figured is from Christmas Harbour, Kerguelen Island, procured 

 by Dr. McCormick, and formerly in our collection. 



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