394 



CORACIIFORMES 



CHAP. 



Ceratogymna data 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 has a rufous head and neck. Rliyti- 

 doceros plicatus of Papuasia and the Moluccas has a reddish and 

 white casque with obliquely overlapping plates, pale blue naked 



FIG. 83. Plait-billed Hornbill. Rhytidoceros undulatus. 



(From Nature. ) 



orbits and throat. The head and neck are chestnut in the male, 

 black in the female. Cranorhinus cassidix 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, 



