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. 444-440.
