Oedee TUBINAEES.] 
[Fam. PEOCELLARIID^. 
PELAGODEOMA MAEINA. 
(WHITE-FACED STOEM-PETREL.) 
Frigate Petrel, Lath. Gen. Syn. iii. pt. 2, p. 410 (1785). 
Procellaria marina. Lath. Ind. Orn. ii. p. 826 (1790). 
Tlialassidroma marina. Gray, Voy. Ereb. and Terror, Birds, p. 17 (1844). 
Thalassidroma hypoleiica, Moquin-Tandon, Orn. Canar. p. 45 (c. 1850). 
Pelagodroma marina, Reich. Syst. Av. p. iv (1852). 
Pelagodroma fregata, Bonap. C. E. xlii. p. 769 (1856). 
Thalassidroma. marina, Hutton, Ibis, 1872, p. 249. 
Thalassidroma fregata, Buller, Birds of New Zealand, 1st ed. p. 321 (1873). 
Ad. suprk cinerascenti-f uliginosus, pileo saturatiore : uropygio imo et supracaudalibus clariiis cineraceis : tectricibus 
alarum brunnescentibus, majoribus pallidioribus : remigibus et rectricibus brunnescenti-nigris : fronte cum 
supercilio distincto, facie lateral! et corpore subtiis toto albis : plumis circumocularibus et regione auricular! 
ciuerascenti-fuliginosis : collo lateral!, hypochondilis imis et subcaudalibus clarius cineraceis : rostro nigro : 
pedibus nigris, palmis flavicantibus : iride saturate rufescenti-nigra. 
Adult. Crown of the head, nape, and a broad patch from the under margins of the eyes, spreading over the ear- 
coverts, sooty grey ; upper surface sooty brown, darker on the wings, and changing to a light grey on the 
upper tail-coverts j forehead, streak over the eyes, face, throat, and all the underparts pure white, shading 
into grey on each side of the breast ; quills and tail-feathers brownish black, the former greyish white on 
their inner webs. Irides dark reddish brown ; bill black ; legs and feet black, the webs yellowish. Total 
length 8 inches j wing, from flexure, 6 ; tail 3 ; bill, following the curvature of upper mandible 65, length 
of lower mandible '75 ; bare tibia '85 j tarsus 1-5 ; middle toe and claw 1-4. 
Nestling. Covered with thick long down of a uniform grey colour. 
Obs. Both sexes appear to be exactly alike. The Canterbury Museum contains several specimens, both male 
and female, from the Chatham Islands. 
Individuals present a certain degree of variation. A specimen in the Otago Museum has the crown and 
upper surface generally blackish brown ; underparts white ; the former colour extending downwards in a 
broad band over both sides of the chest, but not meeting ; face with a broad patch of slaty black covering 
the eyes, spreading over the ear-coverts, and merging in the dark chest-band ; under tail-coverts bluish grey. 
A specimen in the Auckland Museum (sent from Mokohinu Lighthouse) has the patch on the face 
conspicuously darker, and the interdigital webs pale yellow, with black edges, and a line of black between 
the inner and middle toe. 
The White-faced Storm-Petrel appears to have a wide range over the southern ocean. It is not so 
plentiful, however, off the New-Zealand coast as the Grey-backed Storm-Petrel, although the habits 
of the two birds appear to be very much the same. 
Mr. Gilbert discovered it building in some of the small islands lying off Cape Leuwin, in South 
Australia, in December ; and he met with young birds almost ready to leave their holes, on East 
Wallaby Island, a month later. Its egg, of which I have obtained several specimens, is pure white, 
and measures I ’5 inch in length by 1'15 in breadth. 
