Birds of the Weddell and adjacent Seas. 329 
Phebetria cornicoides, Halobena cerulea, ard Céistrelata 
brevirostris, to the short list of nine species previously 
known, according to Mr. Howard Saunders in the ‘Antarctic 
Manual,’ to have occurred south of the Antarctic Circle. 
A specially important ornithological feature of these 
voyages of the ‘ Scotia’ was the presence in the Polar Sea of 
a number of species of Petrels far beyond the southern limits 
of their breeding-areas. This seems to indicate that at the 
close of the southern summer numbers of Hutton’s Sooty 
Albatroses (P. cornicoides), Cape Petrels (D. capensis), Giant 
Petrels (O. gigantea), Antarctic Petrels (7. antarctica), 
Silver Petrels (P. glacialoides), Blue Petrels (H. cerulea), 
and (Hstrelata brevirostris cross the Antarctic Circle and 
sojourn among the polar ice ere they retreat northwards 
to pass the winter in more genial oceanic resorts. It is 
possible, however, that some of these visitors to the far 
south are non-breeding birds, and, if so, they may have 
spent the entire summer there. The Tubinares are, as is 
well-known, great wanderers, but these very remarkable 
southern incursions are, perhaps, to be explained by the 
extraordinary abundance of food to be found in the waters 
of the far south in the summer and autumn, which allures 
some of the birds further and further towards the pole, 
until the great ice-barrier, which almost girdles the Ant- 
arctic Continent, arrests their further progress, since at its 
base the food-supply eutirely ceases. This, too, explains 
why our familiar Arctic Tern (Sterna macrura) passes the 
southern summer (our northern winter) amid these ever-icy 
seas, 
The species observed between 60° S. lat. and Gough 
Island (40° 19’ S., 9° 44’ W.) from April Ist to 21st may 
be usefully enumerated here with a view to connecting 
ornithologically the third instalment of the results with 
the first. These were *Ossifraga gigantea, Daption capensis, 
Priocella glacialoides, * Oceanites oceanicus, * Phebetria corni- 
coides, *P. fuliginosa (55° 8’ S.), Diomedea melanophrys, 
(Estrelata brevirostris, *C£. mollis (48° S.), *Cymodroma 
grallaria (55° 8’ S.), *Priofinus cinereus (49° 25’ S.), 
