OCEANODROMA HORNBYI. 



Adult (type of species). Ashy-grey above, the upper tail-coverts white at the 

 base and edged with white ; lesser wing-coverts blackish, the rest pale ashy-brown ; 

 primary-coverts and quills black, the inner secondaries brown, externally ashy-grey ; 

 crown of head, with the feathers round the eye and ear-coverts, slaty-black ; lores, sides 

 of face and throat pure white, like the rest of the under-surface ; across the fore-neck 

 a broad band of slaty-grey ; under tail-coverts white ; under wing-coverts and 

 axillaries ashy-brown, the latter broadly margined with white. Total length about 

 8.8 inches ; culmen, 0.65 ; wing, 6.0 ; tail, 3.9 ; tarsus, 1.0 ; middle toe and claw, 0.95. 



The above description and the figure in the Plate are taken from the typical 

 specimen in the British Museum, which still remains unique in that institution. 



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