42 
ROOM X. 
Nat. Hist. 
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 
ruder ata ). 
The Earless Agamae ( Phrynocephalus ) have the same 
irregular scales as the Mutable Agamae, but they differ 
from them all, by their ears being hid under the skin, 
as in the Chameleons: one of the Phrynocephali 
(Phrynocephalus auritus) has the margin of the lips 
produced and fringed, and the claws very long, differ¬ 
ing in that respect from the others, as Pallas’s Phryno¬ 
cephalus ( Lacerta caudivolvula), and the Ocellated 
Phrynocephalus {Agama ocellata). 
The Dragons {Draco) 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 the creature 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 Agamae are furnished with a series of 
minute glands on the under side of the hind legs. Some 
of the species, peculiar to New Holland {Gemmato- 
pkora), have rough scales like the Mutable Lizards; 
as the Muricated Agama {Lacerta muricata). 
The Lophurse have a crest of large scales on the 
back; as the Amboina Lophura {Lac, amboinensis ), 
which has been confounded with the Basilisk. 
The last group of Agamae, are peculiar for the tail 
being surrounded with verticillate bands of scales. In 
some of these ( Uromastyx ), the caudal scales are large 
and spinous; as the common Uromastyx {Stellio spi - 
nipes) from Egypt, and Hardwicke’s Uromastyx 
( Uromastyx 
