MONOGRAPH OF THE PETRELS. 



feathers in front of the eye and round the latter black, extending over the 

 ear-coverts ; sides of face blackish, mottled with white ; throat and fore-neck pure 

 white, with a slight indication of vermiculated ashy-brown bars, continued on to the 

 breast, which is also white, with ashy-brown tips to the feathers ; lower breast and 

 abdomen ashy-brown with white bases to all the feathers ; thighs, vent, and under 

 tail-coverts white, with a few ashy-brown bars ; sides of body for the most part white, 

 but freckled with bars of ashy-brown ; axillaries white, with a few vermiculated bars of 

 ashy-brown near the end, the longer ones white for the basal part, the terminal half 

 ashy-grey, with white ends ; under wing-coverts white, the marginal ones slaty-black, 

 the outer greater series mostly white, freckled with black bars ; quills ashy-black 

 below, the primary-coverts and the greater part of the inner webs conspicuously 

 white ; " bill black ; feet dull yellow, the outer toe and interdigital membranes 

 black " (Buller). Total length about 14.0 inches ; culmen, 1.05 ; wing, 9.9 ; tail, 4.0 ; 

 tarsus, 1.35 ; middle toe and claw, 1.6. 



Adult female. Like the male. Total length about 14.0 ; wing, 10.1 ; tarsus, 1.3 ; 

 middle toe and claw, 1.65. 



The nestling is covered with sooty-grey down, not perceptibly whiter below. 



The birds above described were received from Mr. Percy Seymour. The figure is 

 drawn from an example presented by the Hon. Walter Rothschild to the British 

 Museum. 



238 



