844 PMOCELLARIA OCEANODROMA 



$ ad. (Orkneys). General colour sooty black, the under parts paler 

 and browner ; median wing-coverts with pale tips ; base of upper tail- 

 coverts and of tail, sides of crissum, and under tail-coverts white ; tail 

 almost square ; bill and legs black ; iris dark brown. Culmen 0'58, 

 wing 4'6, tail 2*15, tarsus 0'9 inch. Sexes alike. 



Hctb. North Atlantic Ocean, breeding on the Faeroes, Orkney, 

 and Shetland Islands ; of rare occurrence in Scandinavia as 

 far north as the Lofoten Islands ; the Mediterranean and the 

 African coasts south to the Cape on the west, and occurs 

 between the Zambesi and Zanzibar on the east side ; on the 

 American coasts south to the Banks of Newfoundland ; is 

 replaced by P. tethys, Bp., off the Galapagos, this species being 

 larger, with the upper tail-coverts white and the tail emarginate. 



Essentially an oceanic bird the Storm-Petrel only frequents 

 land for the purpose of nidification. It is tolerably swift on 

 the wing, and skims the waves, following their undulations. It 

 feeds on any fatty substance on the surface of the water, small 

 molluscs, &c. During the breeding season it frequents islands, 

 usually remaining in the holes during the day and wandering 

 out to sea in the night. Late in June a single egg is deposited 

 in a hole, or amongst the stones, the nest being scantily lined 

 with plant-stems. The egg is rather elongated-oval in shape, 

 the surface of the shell rather chalky, white in colour, gene- 

 rally with a zone of pale reddish dots round one end, and 

 measures about 1*12 by O85. 



OCEANODROMA, Reich., 1852. 



1159. LEACH'S PETREL. 

 OCEANODROMA LEUCORRHOA. 



Oceanodroma leucorrhoa (VieilL), Nouv. Diet, xxv, p. 422 (1817) ; 

 (Dresser), viii. p. 497, pi. 613, fig. 2 ; Salvin, Cat. B. Br. Mus. xxv. 

 p. 348 ; Tacz. F. 0. Sib. O. p. 1067 ; Kidgway, p. 71 ; Saunders, 

 p. 729; (Lilford), vi. p. 127, pi. 54; Thai leachi, Temm. Man. 

 d'Orn. ii. p. 812 (1820) ; (Naum.), x. p. 575, Taf. 275, fig. 2 ; 

 (Hewitson), ii. p. 520, pi. cxlv. fig. 2 ; Gould, B. of E. v. pi. 447 ; 

 id. B. of Gt. Brit. v. pi. 85. 



Thalassidrome cul-Uanc, French ; Procellaria a coda forcuta 

 Ital. ; Gabelschwdnziger-Schwalbensturmvogel, German ; Stor- 

 Stormsvale, Dan. ; Klofthalet-Stormsvale, Norweg. ; Klyckstjertad- 

 Stormsvala, Swed. ; Umi-tsubame, Jap. 



