WHITE-CHINNED PETREL. 



29 



black, inner webs pale brown, the shafts paler at the base ; under-surface brown ; 

 sides of the face and throat tinged with hoary -grey ; bill flesh colour ; culmen 

 and tips of both mandibles brown ; iris brown ; feet flesh colour. Total length 

 455 mm. ; culmen (exp.) 40, wing 310, tail 104, tarsus 54. 



Adult female. Similar to the adult male but with shorter bill and shorter tarsus. 



Immature. Similar to the adult. 



Nestling. Covered with brownish-grey down, much paler below ; bill shor 

 and stout ; feet small. 



Nest. At the end of a long burrow. 



Egg. Clutch, one ; pure white ; axis 66-72 mm., diameter 47-48. 



Breeding-season. November to January. 



Distribution and forms. West Australia, New Zealand, Lord Howe Island 

 and Japanese seas. Four forms have been indicated from these diverse localities, 

 as follows : H. c. carneipes (Gould) from West Australia ; H. c. hullianus (Mathews) 

 from Lord Howe Island (the specimens were labelled Norfolk Island, where it does 

 not occur, but collected on Lord Howe Island) on account of its larger size, and 

 especially its stouter bill ; H. c. Hakodate (Mathews) from Japanese seas by its still 

 larger size, paler coloration, weaker bill, and inner wing coloration ; and H. c. 

 carbonarius (Mathews) from New Zealand with its weaker bill than H. c. hullianus, 

 and shorter wing, agreeing better with typical form, but with stouter bill than that. 



This species has been procured off the coast of California, and Loomis's 

 measurements suggest that this is a larger race still. 



Genus PROCELLARIA. 



Procellaria Linne, Syst. Nat., 10th ed., p. 131, Jan. 1st, 1758. Type (by subsequent desig- 

 nation Gray, p. 78, 1840) : P. cequinoctialis Linne. 



Prioftnus Hombron et Jacquinot, Comptes Rendus Sci. (Paris), Vol. XVIII., p. 355, March 

 1844. Type : Procellaria cequinoctialis " Edw." = Linne. (P. cinerea Gmelin is not included.) 

 Majaqueus Reichenbach, Nat. Syst. Vogel, p. iv., 1852 (? 1853). Type (by original designa- 

 tion) : P. cequinoctialis Linne. 



Cymatobolus Heine und Reichenow, Mus. Hein., p. 363, (pref. Sept.) 1890. New name for 

 " Majaqueus Reich." 



Largest Puffinine birds with long stout bills, long wings, long rounded tails 

 and strong legs and feet. 



The bill is strong with a well-developed unguis, about half the length of the 

 bill, powerfully hooked ; the nasal tubes are short and are separated by a distinct 

 septum, and open forwards with apparently a vertical aperture. The laterals are 

 strongly developed somewhat laterally. The under mandible has the rami strong 

 and moderately close together, the unguis stout, the interramal space feathered. 

 The wings are long with the first primary longest. The tail is long and rounded, 

 a little less than one-third the length of the wing. The legs are long and stout, 

 not so compressed as in the previous genera and covered with reticulate scales 

 similarly. The toes are longer than the tarsus, the outer longer than the middle 

 which exceeds the inner, all the claws long and sharp. The hind-toe minute, and 

 the anterior toes fully webbed. 



Coloration wholly sooty, sometimes with white markings about the head. 



Procellaria sequinoctialis. WHITE-CHINNED PETREL, 



[Procellaria cequinoctialis Linne", Syst. Nat., 10th ed., p. 131, Jan. 1st, 1758: Cape Seas. 

 Extra-limital.J 



Mathews, Vol. II., pt. 1, p. 112, May 30th, 1912. 



ProceUaria cequinoctialis steadi Mathews, Birds Austr., Vol. II., pt. 1, pp. 110-112, May 30th, 

 1912 : Antipodes Islands, New Zealand. 



DISTRIBUTION. ? East and South Australian Seas. 



