VI PSITTACI 363 
acuminate feathers in Stringops, moderate in the Loriinae and 
Cyclopsittacinae, elongated and wedge-shaped in Conurus, Ara, 
Psittacula, and many species of Palaeornis, long and broad in 
Platycereus and Cacatua, and so forth. Oreopsittacus possesses 
fourteen rectrices, every other genus twelve; in Prioniturus the 
median pair have bare shafts and racquet-tips. 
The U-shaped fureula is sometimes entirely absent; a com- 
pletely ossified orbital ring occurs in the Cacatuinae, Stringopinae, 
and many Psittacinae; the tongue is short and fleshy, being 
fringed in the Nestorinae, or having a brush of hairs towards the 
tip in the Loriinae and Nanodes ; the uniquely modified syrinx 
has three pairs of tracheal and tracheo-bronchial muscles; and a 
crop is present. The aftershaft is large, the down of the adults 
and young is uniform, the latter bemg naked when hatched. 
The coloration is commonly gaudy, and particularly so in 
lop 
ran) 
- x. . . . aa 
Via 72.—Uvaean Parakeet. ymphicus wvacensis. x. (From Nature.) 
