282 THALASSIDROlIIDiE. 



known to nest on the east side, on tlie Bass Eock. It 

 nests in some of the islets off south Wales and in the 

 Scilly Islands, as well as on some of the islands off the 

 north and west coasts of Ireland. In autumn and spring 

 it is generally distributed in British waters, the majority 

 of the birds moving southwards in winter. 



General Distribution, — The Storm-Petrel breeds in the 

 Faeroes and on the Lofoten Islands off Norway; in the 

 Channel Islands and along the coast of Brittany and on 

 some of the Mediterranean Islands. In winter it visits 

 Madeira and the Canary Islands, wandering as far as Cape 

 (*olony and even ascending the east coast of Africa to 

 Zanzibar. It also visits Iceland, south Greenland, Labrador, 

 Newfoundland, and the Bay of Fundy, but it is not known 

 to breed on the American sea-board. 



Genus OCEANODROMA Reichenhach, Av. Syst. Nat. 

 1850, p. iv. 



Type : O.furcata (Gmel.). 



Oceanodroma=^one that nins on the ocean, from wKffl!vos= ocean, ^pa/i67u = 

 to run. 



Oceanodroma leucorrhoa. Leach's Petrel. 



Procellaria leucorhoa Vieillot, Nouv. Diet. d'Hist. Nat. 

 XXV. 1817, p. 422 : Picardy, France. 



Procellaria leucon-hoa Vieill. ; B. O. U. List, 1st ed. 1883, p. 196. 

 Oceanodroma leucorrhoa Salvin, Cat. Birds B. M. xxv. 1896, 

 p. .348; Saunders, Manual, 2nd ed. 1899, p. 729. 



Leucorrhoa, from \6iiKos= white, and oppos=the rump; from the bird's 

 ■white hinder parts. 



Distribution in the British Islands. — A Resident, breeding on 

 St. Kilda, the Flannan Isles, North Rona, the Outer Hebrides, 

 and on some of the islets off cos. Mayo and Kerry. Else- 

 where it is an irregular visitor, chiefly in autumn, and in 

 some winters is common off Cornwall. 



General Distribution. — Leach's Petrel inhabits the north 



