394 CORACIIFORMES CHAP. 
Ceratogymna elata of West Africa has the gular wattle, orbits, and 
bare throat blue, with red on the first and a median line of feathers 
on the last, and an abrupt, high whitish casque, which is black at 
the base in the male. The hen hasa rufous head and neck. Lhyti- 
doceros plicatus of Papuasia and the Moluccas has a reddish and 
white casque with obliquely overlapping plates, pale blue naked 
a 
y, 
Wy) 
Fic. 83.—Plait-billed Hornbill. Rhytidoceros undulatus. x4—%. (From Nature.) 
orbits and throat. The head and neck are chestnut in the male, 
black in the female. Cranorhinus cassidiz of Celebes has a red 
casque, high in front and rounded posteriorly over the skull; both 
mandibles are yellow with red bases, and exhibit grooved plates, 
the bare parts being chiefly blue with a black bar on the throat. 
