Order PROCELLARIIFORMES. 
No. 6. 
Family TIIALASS1 BROMIDE. 
CYMODROMA GRALLARIA. 
(iNNOMINATA.) 
WHITE-BELLIED STORM-PETREL. 
(Plates 6 and 10.) 
Cymodroma Ridgway, Mem. Mus. Comp. Zool. Harvard (Water Birds, North America, Yol. II.), 
Vol. XIII., pp. 363, 418, 1884 (introd. March 31st). Type (by monotypy): Procellaria 
grallaria Vieillot. 
Fregettomis Mathews, Birds Austr., Vol. II., p. 31, May 30th, 1912. Type (by original designa¬ 
tion) : Procellaria grallaria Vieillot. 
Procellaria grallaria Vieillot, Nouv. Diet. Hist. Nat., Vol. XXV., p. 418, Dec. 26th, 1818: 
Australian seas error=Juan Fernandez (breeding) off South America (c/. Murphy, Amer. 
Mus. Novit., No. 124, p. 9, 1924). 
Fregettornis innominatus Mathews, Austral. Av. Rec., Vol. II., p. 124, Jan. 28th, 1915: Lord 
Howe Island ; Kinghom and Cayley, Emu, Vol. XXII., pp. 81-96, 1922 (Oct.); Mathews, 
ib., Vol. XXIII., pp. 51-56, 1923 (July) ; Murphy, American Mus. Novit., No. 124, 
p. 9, July 22nd, 1924 j Hartert, Nov. Zool., Vol. XXXIII., p. 356, Dec. 1926. 
Fregettornis grallarius Mathews and Iredale, Austral. Av. Rec., Vol. IV., p. 108, Dec. 16th, 1920; 
id., Man. Birds Austr., Vol. I., p. 21, March 9th, 1921 : Lord Howe Island. 
Cymodroma grallaria insularis Mathews, Syst. Av. Australas., Vol. I., p. 110, June 13th, 1927. 
Distribution. Lord Howe Island [Rapa Island, Austral Group]. 
Adult female. Black on the head and neck ; mantle, back and scapulars blackish-brown, the 
feathers narrowly margined with white ; median wing-coverts lighter, the feathers narrowly 
edged with white ; lesser wing-coverts, bastard-wing, primary-coverts and quills black; 
rump and upper tail-coverts white, some of the feathers with black near the tip; tail- 
feathers black, with white on the inner webs at the base of all but the middle part; 
breast, abdomen, axillaries and inner under wing-coverts pure white ; smaller coverts 
round the margin of the under-wing black ; under tail-coverts black with white bases; 
bill and feet black ; iris brown. Total length 215 mm.: culmen 14, wing 164, tail 80, 
tarsus 37. Type of innominatus. Collected at the Pines on Lord Howe Island on the 
21st of May, 1914. 
Adult male. Similar to the adult female, but larger wing averaging 181-6. 
Immature. Similar to the above. Wing 158, tail 80, tarsus 36'5, culmen 14. Collected 
on the 26th of May, 1914, at the Pines, Lord Howe Island. 
Nest. A tunnel excavated about eighteen inches in a bank ; the end enlarged to a hole about five 
inches in diameter and lined with a little dead grass on the bottom to form a nest. 
Egg. Clutch, one ; dull white, slightly spotted at the larger end with reddish-brown. Dimensions 
33'5 by 25 mm. 
Breeding-season. January (Lord Howe Island). 
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