Ord^r PR0GELLARIIF0RME8 
No. 77. 
Family HYDROBATIDM. 
PELAGODROMA MARINA DULCI^. 
WEST AUSTRALIAN WHITE-FACED STORM-PETREL. 
(Plate 70 ,)* 
Pelagodeoma marina dtjlco:, subsp. n. ; West Australia ; Type no. 246 in my collection. 
Thalassidroma marina (not Latham) Gould, Birds Austr., Vol. VII., PI. 61, 1845. 
Pelagodroma marina Salvin, Cat. Birds Brit. Mus., Vol. XXV., p. 362, 1896 (pars) ; Hall, 
Key Birds Austr., p. 91, 1899 ; Oates, Oat. Birds’ Eggs Brit. Mus., Vol. I., p. 150, 
1901 ; Campbell, Nests and Eggs Austr. Birds, p. 872, 1901 ; Hall, Key Birds 
Austr., p. 91, 1906 ; Godman, Monogr. Petrels, p. 53, 1907 (pars) ; Mathews, Handl. 
Birds Austral., p. 15, 1908. 
Pelagodroma fregata (not L.) Coues, Proc. Acad. Nat. Sci. Philad. 1864, p. 88 (pars) ; Gould, 
Handb. Birds Austr., Vol. II., p. 482, 1865 ; North, Austr. Mus. Oat. No. 12, p. 362, 
1889 (pars). 
Procellaria fregata (not L.) Schlegel, Mus. Pays-Bas, Vol. VI., Procell., p. 5, 1863. 
Procellaria {Pelagodroma) fregata Ramsay, Proc. Linn. Soc. N.S.W. 1877, Vol. II., 
p. 203 (pars). 
Distribution. West Australian seas. 
Adult male. Crown of head and a line below the eye on to the ear-coverts dark slate-colour ; 
hind-neck, sides of neck, and mantle and upper-back dark ash-grey with a 
brownish shade ; lesser wing-coverts, primary-coverts, and quills black, the latter 
more or less white on the inner webs towards the base ; greater coverts brown with 
pale margins ; lower -back and scapulars dark brown ; upper tail-coverts grey barred 
with white at the base ; tail black ; forehead, lores, an irregular line over the eye, 
and under-surface pure white like the axillaries and under wing-coverts ; thighs and 
lateral under tail-coverts grey, the latter with white bases ; bill black, iris hazel, 
feet black, webs yellow. Total length 209 mm. ; culmen (exp.) 17, wing 156, tail 69, 
tarsus 41. 
Adult female. Similar to the male. 
Immature. A very small, downy young shows the adult coloration to be taken on with 
the first feathers, the only noticeable difference being white edgings to the 
primary- and secondary- quills, and wavy grey and white undulating marks on 
the upper tail-coverts and rump. 
Fully-feathered young are quite like the adult but cleaner-looking, with con- 
spicuous white edgings to the secondaries. The wing-measurement is noticeably 
less. 
Nest. In a burrow. 
Egg. “Pure white, one inch and a half long by one inch and an eighth broad ” (Gould). 
Breeding-season. December ; January (Gould). 
* The Plate is lettered Pelagodroma marina. 
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