MONOGRAPH OF THE PETRELS. 



from the fore-neck downwards slaty-brown, with ashy-brown edges to the feathers ; 

 under wing-coverts paler brown, the greater series and the quill-lining rather more 

 ashy ; " bill pale yellowish horn-colour, the unfeathered skin-folds at the gape and 

 junction of the bill and feathers, bluish-grey ; iris brown, with yellowish radiating 

 streaks ; skin of eyelids bluish grey ; legs* and toes grey, with a pale yellowish tinge ; 

 web fleshy grey ; nails blackish horn " (E. A. Wilson). Total length, 33 inches ; 

 culmen, 4.1 ; wing, 21.0 ; tail, 7.7 ; tarsus, 3.8 ; middle toe and claw, 5.4. 



The specimen described is from Cape Adare, obtained by the " Southern Cross " 

 Expedition ; that figured is from Coquimbo Bay, procured by Admiral Markham. 

 Both are now in the British Museum. 



* In the Plate the legs and feet are represented as blackish. 



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