340 Mr. W. Eagle Clarke on the 
species and at least one of the Whale-Birds (Prion) were 
confounded by the Scottish explorers—a pardonable error 
also made long years ago during Cook’s voyage in the 
Antarctic seas, and, no doubt, often since repeated. For- 
tunately, however, a number of specimens of these ‘ Blue 
Petrels’’ were secured, and afford authentic information 
regarding both this species and Prion banksi in the seas 
visited by the Expedition. 
The data accompanying the skins of H. ce@rulea, the Blue 
Petrel proper, enable me to extend the distribution of this 
species far to the south of all previous records of a reliable 
nature. Salvin (¢. c. p. 431), the monographer of the 
Petrels, gives its range as being between 40° and 60° S., or 
practicality where Cook left it in the latter half of the 18th 
century ; and it has no place in the bird section of the 
‘Antarctic Manual.’ From the ‘Scotia,’ specimens were 
captured as far south in the Weddell Sea as 69° 33’ S., and 
others, believed to be of this species, were observed as high 
as 71° 28'S. It probably occurs even beyond the limits 
indicated, for I think there can be little doubt that this 
was the bird which Weddell met with on February 18th, 1823, 
a little further to the west, in 73° S., where he tells us (op. cit. 
pp. 35-6) “the sea was literally covered with birds of the 
Blue Petrel kind.” Ross (¢. ¢. p. 359) also mentions a 
“Blue Petrel”’ as seen in the Weddell Sea in 67°06’ S. 
and 8° 35° W.  Banks’s Whale-Bird (Prion banksi), the other 
“Blue Petrel” of the Expedition, was not obtained beyond 
66°S., and I am not aware of any reliable record of its 
occurrence within the Antarctic Circle. 
“Blue Petrels ” appear very frequently in the Log of the 
‘Scotia’ during the two southern voyages, but H. cerulea 
was not obtained north of 64° 29’ S., and the ten specimens 
in the collection were secured between that latitude and 
69° 33' S., and longitudes 12° 49' and 35° 29’ W. All but 
two were obtained south of 68°, and in the month of March 
(1903 and 1904). On February 25th, 1904, two specimens 
of this species, and one of Prion banksi, were captured in 
64° 29’ S. and 35° 29’ W. 
