Order PR0CELLARIIF0BME8. 
No. 420. 
Family PROCELLARIIDJE. 
PTERODROMA INEXPECTATA. 
MOTTLED PETREL. 
(Plate 368.) 
Procellaria INEXPECTATA Eoister, Descr, Anim. (ed. Licht), p. 204, (pref. Jan. 1) 1844 : 
Seas south, of New Zealand. 
Pterodroma inexpectata thompsoni Mathews, Austral Av. Rec., Vol. II., No. 7, p. 125, Jan, 
28, 1915 : East Australia. 
Adult male. General colour of the upper-surface hoary-grey, with white bases to the 
feathers, which show through the grey in many places ; the tips of the feathers 
on the head, back, scapulars, and short upper tail-coverts dark brown or 
blackish ; lesser and marginal upper wing-coverts, bastard-wing, primary- 
coverts, and outer webs of flight-quills blackish-brown ; the inner webs of 
the last for the greater part white ; median and greater upper wing-coverts 
and secondary-quills hoary-grey with narrow white edgings on the outer webs, 
the inner webs for the most part white, except the innermost where both webs 
are grey ; long upper tail-coverts and tail-feathers pale slate-grey, except the 
two outer ones on each of the latter, which are mottled with white ; fore-head 
and sides of face, including the feathers surrounding the eyes, white with minute 
dark tips to the feathers ; chin and throat pure white ; breast, abdomen, and 
sides of body dusky-brown with white bases to the feathers which show through 
and impart a mixture of brown and white, some of the feathers on the sides of 
the body and lower flanks are barred with white and dusky-brown ; under tail- 
coverts cream-white and reach the tip of the tail ; axfllaries white, mottled and 
barred with dusky-brown ; under wing-coverts blackish-brown, more or less 
mottled and blotched with white ; under-surface of flight-quiUs for the greater 
part white with pale brown along the shafts and at the tips of the primaries 
and grey tips to the secondaries ; lower aspect of tail grey, the two outer 
feathers on each sides mottled Avith vvliite, almost the whole of the tail below is 
obscured by the under tail-coverts, which are cream-white. Bill black, tarsus 
fleshy, feet black with base of inner web whitish. Total length 283 mm. ; 
cuhnen 25, wing 251, tail 93, tarsus 35. Figured. Collected at Circular Head, 
Tasmania, on the 6th February, 1890, and is the type of P. i. thompsoni Mathews. 
This species is only known as yet as breeding in south New Zealand 
and the islands south of New Zealand. A specimen was described as a 
new species as (Estrelata fischeri by Ridgway from St. Paul, Kodiak Island, 
Alaska : another of the same form from the North Atlantic as Mstrelata 
scalaris by Brewster. 
VOL. vn. 
425 
