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CHAUNA. CHAUNA. 
Generic Character. 
Rostrum capite brevior, basi 
plumulis tectis, conico- 
convexum, subfornicatum, 
apice curvato. 
Vertex simplex. 
LorcB nudag. 
Aloe calcaria dua armatas. 
Pedes tetradactyli, fissi; di- 
gito postico apice solo in- 
sistens ; ungues posticis 
intermediisque fere rectis. 
Beak shorter than the head, 
its base clothed with small 
feathers, conico-convex, 
slightly arched, its tip 
curved. 
Crown simple. 
Lores naked. 
Wings armed with two spurs. 
Legs four-toed, cleft ; the 
hinder toe resting on its 
base alone ; the hinder and 
intermediate claisos nearly 
straight. 
CHAUNA. Illig., Cuv., Temm. 
PARRA. Linn., GmeL, Lath. 
OPISTOLOPHUS. Vieil. 
IS genus greatly approaches to the Screamer, 
from which, however, it may be at once distinguished 
by the absence of the corneous appendage on the 
crown of the head ; and from the occiput being orna- 
mented with an elevated crest, and the head and 
upper part of the neck being clothed with down. 
