848 OCEANODROMA OCEANITES 



edged with greyish white ; chin, throat, and under tail-coverts nearly 

 white ; bill and feet black. Culmen 0'83, wing 6'25, tail 3'6, the middle 

 feathers 0'74 shorter than the lateral ones, tarsus 1*03. 



Hab. North Pacific Ocean, south to Oregon, and the Kurile 

 Islands. 



In habits this Petrel is said not to differ from its allies. It 

 breeds on small islands off Unalaska, on Copper Island and the 

 Kuriles, in holes 3 feet or more deep in the steep basaltic rocks, 

 depositing in July a single glossless white egg, sometimes marked 

 at the larger end with purplish black or lilac dots or spots, and 

 measuring about T31 by TOO. 



OCEANITES, Keyserl. and Bias., 1840. 



1165. WILSON'S PETREL. 

 OCEANITES OCEANICUS. 



Oceanites oceanicus (Kuhl.), Beitr. p. 136, Tab. x. fig. 1 (1820) ; Dresser, 

 viii. p. 505, pi. 614, fig. 1 ; Salvin, Cat. B. Br. Mus. xxv. p. 358 ; 

 Blanf. F. Brit. Ind. Birds, iv. p. 354 ; Saunders, p. 733 ; Kidgway, 

 p. 71 ; Lilford, vi. p. 131, pi. 56 ; 0. wilsoni (Bp.), Journ. Acad. 

 Philad. iii. p. 231, pi. 9, fig. 2 (1823) ; (Audubon), B. N. Am. 

 pi. 270 ; Gould, B. of Austral, vii. pi. 65. 



Casquilho, Portug. ; Pastor cito, Span. 



ad. (off Fayal). Sooty black with a greyish tinge, especially on the 

 head and neck ; wing-coverts brownish, some of the middle ones marked 

 with greyish white ; sides of rump and of under tail-coverts, and lower 

 flanks white ; tail nearly even ; bill and legs black, the basal half of the 

 webs yellow ; iris dark brown. Culinen 0'65, wing 5 '75, tail 3'0, 

 tarsus 1'3, bare part of tibia 0'65 inch. 



Hob. Atlantic Ocean, north to the coasts of Labrador and of 

 the British Isles, south to the Ice-barrier in the Antarctic 

 Ocean ; the Indian Ocean north to the Mekran coast ; the 

 Australian seas and New Zealand. 



In habits it resembles P. pelagica, and like it is essentially an 

 ocean bird. It was found breeding on Kerguelen Island in 

 January and February, by the Rev. A. E. Eaton, and since then 

 plentifully on South Victoria Land, Antarctic regions. The 

 single egg is laid in dry chinks and crevices under rocks, and 

 is like that of P.pelagica, but speckled and dotted chiefly round 

 one end with pink, and measures about 1*30 by 0'92. 



The young in down of all the preceding species of Petrels are 

 covered with sooty brownish or greyish down from which they 

 moult into the adult dress. 



