BY A. F. BASSET HULL. 785 



opinion that Dr. Crowfoot's P. sphenurus (chlororhynchus) is P. 

 yriseus; and some eggs procured for me by a collector in Decem- 

 ber, which are certainly not those of P. chlororhyncluts, but 

 agree with the dimensions of those of P. griseus. 



OeSTKELATA MONTANA, n.sp. 



Lord Howe Petrel. 



General colour above slate, feathers of the back broadly mar- 

 gined with darker, shafts darker; feathers of the crown of the 

 head brown, each with a narrow subterminal grey band; forehead 

 brown, the sides of the feathers broadly margined with white; 

 lores, feathers brown, wholly margined with white; throat slaty- 

 grey, visible bases of the feathers white, producing a mottled 

 -a|>pearance; cheeks and sides of head brown, under surface 

 ashy-brown, darker on the neck and abdomen, lower neck 

 feathers broadly margined with paler shade; bases of all blie 

 body-feathers pure white; wing-coverts, primaries brown, faintly 

 margined with grey ; secondaries brighter brown, margined 

 with lighter; primaries with quills black, except at the extreme 

 'base, where they shade gradually to white; outer webs black; 

 inner web next to the quill blackish-grey, then shading from 

 white at tlie base and for half the length of the feather to 

 greyish-black at the tip; secondaries slate, quills black; outer web 

 faintly margined at apical end with pale grey, inner web greyish- 

 white at base, blackish along quill extending diagonally to the 

 ■edge of the featlier, which is faintly margined with white; under 

 wing-coverts slate, bases and margins of feathers white; rump 

 and upper tail-coverts slate, margined with darker, becoming less 

 dark and succeeded by a ziarrovv white outer edge; outer tail- 

 feathers dark slate, quills brown, basal half of inner web with 

 narrow margin extending to apical end of outer web white; 

 central tail-feathers almost uniform slaty-brown, with white 

 bases, narrow edge and tips white; bill black; tarsi and first 

 joint of inner toe horn-colour. Total length 17 "6 in., wing II "6, 

 tail 5*45, bill 1'37, tarsus 1'68, middle toe and claw 2-45; wing.__^ 

 extends 0*75 in. beyond the tail. y}'. -/ . i^ y 



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