( 55 ) 
a. R. Proper. 
Beak larger than the 
head. Fig. 147. 
h. Pteroglossus, Illi^. 
Aracari. 
Beak less than the 
head, covered with a 
less solid horn. Fig. 148. 
1 1 . PSITTACUS, Z^m.PAR- 
ROTS. 
Beak large, hard, so- Tongue thick, fleshj; 
lid, rounded entirely, and rounded, 
encircled at its base by 
a membrane wherein 
the nostrils are pierced. 
(!)• 
I 
M. Aras. 
Cheeks naked of fea- 
thers. 
The torrid zone of 
both continents, but 
even every large island 
has its peculiar species, 
their wings not ena- 
bling them to cross any 
extent of sea. 
America. 
Parrakeets. 
et. Parrakeet Aras. 
Vadl. 
Circle around the eye 
naked. 
/?. Arrow-tailed Par- 
rakeets. 
^ ] The two middle pen- 
feathers much longer 
than the others. 
y- 
Tail enlarged to- 
wards the end. (2) 
(T. Parrakeets pro- 
per, Vaill. 
Tail almost equally 
graduated. 
(1) This membrane and the form of their tongue, give them great facility in 
imitating the human voice. Their inferior larynx is very complicated, and furnished 
with three peculiar muscles on each side, which also contributes to the above 
faculty; their powerful jaws are put in action by a greater number of muscles 
than those of other birds. Their intestines are very long and they have no coecum, 
(2) The name of Lorh has been given to those species the ground of whose 
plumage is red. 
