DIOMEDEA PLATEI. 



outer primaries with ■white shafts ; tail-feathers dark slaty-grey, the inner webs 

 blacker, the shafts white ; head pale ashy-grey, whiter on the forehead and becoming 

 slightly darker on the neck and upper mantle ; lores and sides of face also ashy- 

 grey ; a streak from the base of the bill extending through the eye, to a short way 

 beyond it, black ; throat and fore-neck delicate ashy-grey ; remainder of under- 

 surface pure white, including the under wing-coverts and axillaries ; feathers round 

 the bend of the wing mostly smoky-brown ; quills black below, rather greyer on the 

 inner web. Bill (in skin) horny grey, the culmen slightly paler, the unguis of 

 both mandibles blackish horn-colour. Total length, about 31 inches ; culmen, 

 4.6 ; wing, 19.0 ; tail, 7.2 ; tarsus, 2.85 ; middle toe and claw, 4.6. 



The description and figure are both taken from the type lent by the 

 Director of the Berlin Museum. 



347 



