ROOM X.] NATURAL HISTORY. 35 
the back being small and horizontal; as the Blue Broncho- 
cele ( Agama cristatella), and the Long-legged Bronchocele 
(Agama vultuosa); one species, the Armed Bronchocele 
(Agama armata ), has a square head and long subulate 
spines over the eyes ( Acanthosaura). 
The true Agamee (Agama) have often bundles of spines 
on the sides of the neck, as the Occipital Agama (Agama, 
'occipitalis), the Common Agama (Agama spinosa). The 
male of the Pondicherry Agama (Agama pondiceriana) 
has so large a pouch under the throat, (which is quite 
wanting in the female,) that it has been separated as a 
genus under the name of Sitana. 
The Common Stellio (Lac. stellic ), which was formerly 
much esteemed for its medicinal qualities, has bands of large 
spines round its tail. The Trapeli or Mutable Agamae, so 
called from the rapidity with which they change the colour 
of their skin, are generally armed with irregular, spine¬ 
like scales ; as the Cape Agama (Trapelus hispidus), the 
Yellow-striped Agama (Agama atra ), and the Mutable 
Agama ( Agama ruderata). 
The Earless Agamse (Phrynocephali) have the same 
irregular scales as the Mutable Agamse, but they differ 
from them all, by their ears being hid under the skin, as 
in the Chameleons : one of the Phrynocephali (Phrynoce- 
phalus auritus) has the margin of the lips produced and 
fringed, and the claws very long, differing in that respect 
from the others, as Pallas’s Phrynocephalus (Lacerta can - 
divolvula), and the Ocellated Phrynocephalus (Agama 
ocellata). 
The Dragons (Lracones) differ from all these by the skin 
of the sides being extended into the form of wings, and 
supported by the end of the ribs. The wings, when 
the animal is at rest, are folded together on the sides of 
the body, but when it leaps from branch to branch 
they are expanded, and act as a parachute ; there 
are several species, differing from one another in the 
length of the throat-pouches, and in the colour of the wings. 
The rest of the Agamse are furnished with a series of 
minute glands on the under side of the hind legs. Some 
of the species, peculiar to New Holland (Gemmatophorce),* 
have rough scales like the Mutable Lizards; as the Muri- 
cated Agama (Lacerta muricata). 
The Lophyri have a crest of large scales on the back; 
