FHATERCULA. THALASSIDROMA. 28.1 



on the Scilly Islands and in the wilder parts of Ireland. In 

 winter it inhabits the seas off our coasts, and in stormy 

 weather is sometimes driven ashore and far inland. 



General Distribution. The Puffin breeds in the north 

 Atlantic and Arctic Oceans, from Novaya Zemlya and 

 Spitsbergen to Greenland and eastern North America, and 

 southwards from the coast of Norway to the Berlenga Islands 

 off Portugal ; also in the Faeroes, Iceland, and in America 

 to the Bay of Fundy. In winter it visits the Atlantic and 

 western Mediterranean east to Sicily, and ranges occasionally 

 as far south as the Canary Islands, the Azores, and Delaware 

 Bay in America. Birds from the Arctic seas are somewhat 

 larger than those from the south and have been recognised 

 as a distinct race. 



Order PROCELLARIIFORMES. 

 Family THALASSIDROMID^E. 



Genus THALASSIDROMA Vigors, Zool. Journ. ii. 1825, 

 p. 405. 



Type: T. pelagica (Linn.). 



Thalas8idroma=one that runs on the sea, from 0dXacr<ra = the sea, and 

 $pa/x6ii/=to run. 



Thalassidroma pelagica. STORM-PETREL. 



Procellaria pelagica Linnceus, Syst. Nat, 1758, p. 131 : 

 coast of Sweden. 



Procellaria pelagica Linn. ; B. O. U. List, 1st ed. 1883, p. 196 ; 

 Salvin, Cat. Birds B. M. xxv. 1896, p. 343; Sounders, 

 Manual, 2nd ed. 1899, p. 727. 



Peiagica^ireXayiKos, oceanic; from 7rt'Xayos=the open sea. 



Distribution in tlie British Islands. A Eesident, breeding 

 in the Shetland and Orkney ]slands and on many of the 

 islands off the west coast of Scotland; it has also been 



