IN8ESS0RES. 25 



The bird varies considerably in size and weight, some spe- 

 cimens weighing as much as one pound and ten ounces, while 

 others weighed no more than one pound and three ounces. 



The sexes differ but little from each other. I believe the 

 birds with white bills to be immature. 



Crown of the head, cheeks, tliroat, upper and under surface 

 brownish black ; feathers of the breast obscurely tipped with 

 dull olive ; ear-coverts yellow ; two centre tail-feathers deep 

 blackish brown, the remainder black at the base and tips, the 

 central portion being in some specimens uniform light lemon- 

 yellow, and in others the same colour blotched with spots and 

 markings of brown ; bill in some specimens white, in others 

 blackish brown ; feet greyish brown ; orbits in some black, 

 in others pink ; irides nearly black. 



Total length 24 inches ; wing 14^ ; tail 12 ; tarsi 1. 



Sp. 403. CALYPTORHYNCHUS BAUDINII, %. 



Baudin's Cockatoo. 



Calyptorhynchus baudinii, Vig. in Lear's 111. Psitt., pi. 6. 

 Plyctolophus ? baudinii, Swains. Class, of Birds, vol. ii. p. 302. 

 Oo-laak of the Aborigines of the lowland, and 

 Ngol-ye-nuk of the Aborigines of the mountain districts of Western 



Australia. 

 White-tailed Black Cockatoo of the Colonists, 



Calyptoryhnchus baudinii, Gould, Birds of Australia, fol., vol. v. 

 pi. 13. 



This species, which is a native of Western Australia, is 

 distinguished from all the other known members of the group 

 by its smaller size and by the white markings of its tail- 

 feathers. It belongs to that section of the Black Cockatoos 

 in which a similarity of marking characterizes both sexes, 

 such as Calyptorhjnchm funereus and C. ccanthonotus. Like 

 the other members of the genus it frequents the large forests 

 of Eucalypti and the belts of BanksicB, upon the seeds of 



