with greenish gloss. Abdomen, thighs, rump, upper and lower tail-coverts, and tips of secondaries
pure white. Head covcrcd by a rather full crest, with occasional feathers spotted with white.
Tail black, glossed with green ; all the rectrices except the central ones tipped with white.
Ij(!iigth of bill inches, length of casque 5, height of bill and casque 3, wing 12, tail 10,
tarsus 2.
Female the same as the male in colour of plumage. The bill, and casque black. The latter
rises from tlie culmen about one third its length from the tip, and inclines gradually backwards
to the liead. ft is occasionally roughened on the sides by longitudinal creases or depressions
running the entir<! length ; this is probably the évidence of age.
Length of bill inches, licight wing 10-^, tail 6i, tarsus
Specimens described and figured are in tlic collection of the British Museum.