its larger size, its forked tail, and its generally lighter 

 colour. This Petrel ranges as far south as the island of 

 Madeira on our side of the Atlantic, and is occasionally 

 met with in the Mediterranean. An interesting account 

 of the breeding-habits of this bird as observed by 

 Mr. Dixon during a visit to St. Kilda in 1884 will 

 be found in Seebohm's ' British Birds,' vol. iii. 

 pp. 444—446. 



