104 EDWARD A. WILSON. 
HALOBANA CARULEA. 
The Blue Petrel. 
Procellaria cerulea, Gmel., Syst. Nat., 1. (1788), p. 560. 
Halobena cerulea, Bp., Compt. Rend., xlii., 1856, p. 768; Salvin, Cat. B. Brit. Mus., xxv. (1896), p. 431, 
sbique citata. 
MATERIAL IN THE ‘ DISCOVERY’S’ COLLECTION. 
No. 131, ad. sk., 9. 61° 46'S. 140° 12’ E. Nov. 16,1901. In pack ice. 
Colouring of the soft parts :— 
Bill, bluish black, the latericorn of the maxilla distinctly bluish. 
Legs and toes, pale cobalt blue. 
Webs, pink in the centre, grey borders at the free edges. 
Claws, black. 
Halobena cerulea is a bird which can easily be distinguished at sea from any Prion 
by the white termination to its tail. Flying constantly in company with the different 
species of Prion, in size and colouring much the same, it would be difficult to tell them 
apart were it not for this. 
We first encountered it on October 24th, 1901 (45° 8. 48° E.), when a very heavy 
sea was running, with a high wind and occasional storms of snow. Considerable 
numbers were flying round about the ship, and we kept them with us from that date 
onward as we went south; they were still with us in the denser ice-pack (62° 8. 
140° E.) on November 16th and 17th, 1901. 
On our homeward voyage we had them with us again in the South Pacific between 
135° W. long. and the Horn, and between 55° and 60° S. lat.; also in the South 
Atlantic, not far from the Falkland Islands. 
These observations coincide with the accepted range of this bird, which is given as 
the Southern Seas, between lat. 40° S. and 60° S. 
It has been known to breed in Kerguelen Island, where Mr. Eaton obtained their 
first eggs plentifully on October 23rd, laid in burrows made in the Azorella growing 
upon dry soft loam. A nestling, almost full fledged, was killed at the same place 
on February 9th. It has been obtained also at the Cape of Good Hope, and in 
the Pacific Ocean near Cape Horn; and we ourselves obtained a specimen, which 
was unfortunately shot to bits, in the pack ice of 62° S. lat. 140° E., two degrees 
farther south than the range given in the British Museum Catalogue. 
PRION VITTATUS. 
The Broad-billed Whale Bird. 
Procellaria vittata, Gmel., Syst. Nat. I. (1788), p. 560. 
Prion vittatus, Lacép., Mém. Inst. (1801), p. 514; Salvin, Cat. B. Brit. Mus. XXV. (1896), p. 432, ibigue 
citata. 
