Notes on the identification of the black Cockatoo (Calyptorhynchus xanthonotus)

Through the courtesy of Mr. M. W. Harrison, I have been permitted to examine the egg of the Black Cockatoo (Calyptorhynchus xanthonotus), and the following interesting data has been kindly supplied to me by that gentleman. The bird was seen by Mr. Leslie Burbury on several occasions to fly from a hole in a gum tree, also by a shepherd in Mr. Burbury's employ. Both saw the bird leave the nest on the occasion of taking the eggs.