272 HANDBOOK OF BRITISH BIRDS 



of islands near the mouth of the Tagus, a trifle 

 north of the latitude of Lisbon (Saunders, Ibis, 

 1871, p. 402), otherwise known to mariners as the 

 Burlings (Feilden, Zool, 1884, p. 470). 



In autumn the palpebral appendages and portions 

 of the beak are shed in a curious manner, causing 

 the beak to appear smaller and darker in winter 

 than it is in summer (Bingley, "North Wales," 

 vol. i. p. 354). For a full description of this 

 change, translated by me from the French of Dr. 

 Bureau, see Zool., 1878, p. 233, with coloured 

 plate. 



As to the appearance of Puffins in winter, and the 

 divergency exhibited at that season in the form of 

 the beak, see Zool, 1862, p. 8003, and 1863, p. 8331. 

 Beilby, who wrote the letterpress for Bewick's 

 " British Birds," thought it evident, on comparing 

 several specimens, that their beaks " increase in 

 size with their age ; " but, as will be seen from a 

 perusal of Dr. Bureau's paper, this is not the case. 

 The weight of an adult Puffin is 13 oz. 



A larger species, from Spitsbergen, Fratercula 

 glacialis (Leach), has been reported to have been 

 met with in the Isle of Wight (More, Zool., 1860, 

 p. 6858, and Venables, "Guide to the Isle of 

 Wight," p. 434), but the identification of the speci- 

 men obtained was not subsequently confirmed. 



An excellent account of F. glacialis, by Prof. 

 Newton, with a coloured plate by Wolf, will be 

 found in The Ibis for 1865, p. 212, pi. vi. 



