the Tubinares in the North Atlantic Islands. 477 



islands, and have never once seen this Shearwater in the 

 summer months. Moreover, I have remained in the eastern 

 group in May and June, and during my last expedition the 

 islands of Allegranza, Montaiia Clara, and Graciosa were 

 thoroughly explored, living as we did in tents on each island 

 in the midst of hundreds of Petrels. During this trip, at a 

 time when P. p. puffinus is usually breeding, we did not sec 

 or hear of a single example, although specially on the look- 

 out for it, particularly on Allegranza. 



10. Puffinus assimilis baroli. Atlantic Allied Shearwater. 

 Type locality — Desertas, near Madeira. 



Puffinus baroii Bonaparte, Consp. Gen. Av. 1856, p. 201. 



Puffinus godmani Allen, Auk, 1908, p. 339. 



Puffinus obscurus atlanticus Rothschild & Ilartert, Bidl. 

 B.O.C. xxvii. 1911, p. 43. 



Puffinus bailloni Bouap. ; Godman, Monograph of Petrels, 

 p. 138. 



Pvffinus assimilis haroli BonaiD.; Bannerman, Ibis, 1914, 

 p. 264. 



Breeding range in the North Atlantic Islands. 

 ? Azores, Madeira Group, Salvage Is., (Janary Is. 



Range beyond the North Atlantic Islands. 

 Confined to the islands mentioned above. Represented 

 by allied forms in several widely separated localities in the 

 Pacific and Indian Oceans. 



As considerable confusion has taken place in the past 

 with regard to the correct name to be used for this Shear- 

 water, I have gone very carefully into the matter and have 

 given a detailed review of the nomenclature employed by 

 former writers on this bird, in 'The Ibis,' 1914, pp. 264-266. 



P. assimilis baroii is the only form of the P. assimilis- 

 group of Shearwaters which is found beyond the Pacific or 

 Indian Oceans, and the reason why it is so far removed 

 geographically from the other members of this blue-backed 

 group is certainly a very difficult point to determine. 



SER. X. VOL. II. 2 K 



