Order PROCELLARIIFORMES. 
No. 55. 
Family DIOMEDE1DM. 
THALASSOGERON CHRYSOSTOMA. 
GREY-HEADED MOLL Y-MA WK. 
Mathews, Birds of Australia, Vol. II., pt. m., p. 277, pi. 97, Sept. 20th, 1912. 
In the above place I did not know of any authentic record of the breeding 
habits of this species. 
In the July Ibis for 1923, p. 488, Mr. G. H. Wilkins gives the following 
from South Georgia :— 
Young (just hatched) light grey down, slightly darker on the wings, becoming darker with age ; 
bill dark horn-colour; iris light brown ; feet light grey. 
Nest. Cone-shaped, 30-35 cm. [2 feet to 2 feet 14 inches] high, about 30 cm. [2 feet] wide at the 
top and 50 cm. [2 feet inches] at the bottom ; built with moss and earth, lined 
with grass. The nests are used each year for breeding purposes, and are apparently used 
throughout the other seasons for places of rest. 
Egg. One to a clutch. Dull white: average measurements 101 by 74 mm. 
Breeding-season. December [January]. 
