The entire plumage is blackish brown, glossed with green, especially on the forehead; all the feathers narrowly tipped with dull white; ear-coverts creamy white; all but the two central tail-feathers crossed by a broad band, equal to half their length, of cream-white; the external web of the outer primary and the margin of the external web of the other banded feathers blackish brown; the shafts black; irides blackish brown; bill lead-colour; in some specimens the upper mandible is blackish brown; legs and feet dull yellowish grey, tinged with olive. The figure represents a male about three-fourths of the natural size. [Illustration: CALLOCEPHALON GALEATUM. _J. Gould and H.C. Richter del et lith._ _Hullmandel & Walton Imp._ ] CALLOCEPHALON GALEATUM. Gang-gang Cockatoo. _Psittacus galeatus_, Lath. Ind. Orn., Supp. p. xxiii.—Kuhl, Consp. Psitt, in Nova Acta, tom. x. p. 88. _Red-crowned Parrot_, Lath. Gen. Syn., Supp. vol. ii. p. 369. pl. 140.—Shaw, Gen. Zool., vol. viii. p. 523.—Lath. Gen. Hist., vol. ii. p. 218. pl. xxviii. _Calyptorhynchus galeatus_, Vig. and Horsf. in Linn. Trans., vol. xv. p. 274.—Less. Man. d’Orn., tom. ii. p. 144. _Corydon galeatus_, Wagl. Mon. Psitt. in Abhand., vol. i. pp. 504 and 690. _Plyctolophus galeatus_, Swains. Class. of Birds, vol. ii. p. 302. _Banksianus galeatus_, Less. Traité d’Orn., p. 181. _Callocephalon Australe_, Less. _Callocephalon galeatum_, G. R. Gray, List of Gen. of Birds, 2nd edit., p. 68. _Cacatua galeata_, Vieill. Nouv. Dict. d’Hist. Nat., tom. xvii. p. 12.—Ency. Méth., tom. iii. p. 1414. _Psittacus phœnicocephalus_, Mus. de Paris. _Gang-gang Cockatoo_, Colonists of New South Wales. The only information I can give respecting this fine species is that it is a native of the forests bordering the south coast of Australia, some of the larger islands in Bass’s Straits, and the northern parts of Van Diemen’s Land, and that it frequents the most lofty trees and feeds on the seeds of the various _Eucalypti_. A few instances have occurred of its being brought to England alive, where it has borne captivity quite as well as the other members of the great family to which it belongs; thus affording sufficient evidence that the Black Cockatoos (_Calyptorhynchi_) would thrive equally well were the experiment made, the form and habits of the two birds being very similar. The paucity of the account here given will I trust be a sufficient hint to those who may be favourably situated for observing the habits of this species, that by transmitting their observations either to myself or to any scientific journal, they would be promoting the cause of science, and adding to the stock of human knowledge. The sexes are readily distinguished by the marked difference in their plumage; both are crested, but the crest of the male is a rich scarlet, while that of the female is grey.