43 
ties of form, and have therefore been separated into 
many groups. Some have the head Lyre-shaped, and 
the back and tail crested ( Gonyocephalus ), as, the Tiger 
Agama ( Agama tigrina). 
Other species have the head armed with spines over 
the back of the ears, and the scales large and directed 
upwards ( Calotes ), as the Common Calotes ( Lacerta 
calotes ), of a fine blue colour, and the Indian Calotes 
( Agama indica). These animals lay fusiform eggs. 
The Bronchocelse differ from the Calotes, by the 
scales of the back being small and horizontal; as the 
Blue Calotes ( Agama cristatella ), and the Long-legged 
Calotes ( Agama vultuosd) ; one species, the Armed 
Calotes ( Agama armata ), has a square head, and long 
subulate spines over the eyes ( Acanthosaura ). 
The true Agamse (Agama) have often bundles of 
spines on the sides of the neck, as, the Occipital Agama 
(Agama occipitalis ), the common Agama (Agama spi - 
nosa). The male of the Pondicherry Agama (Agama 
pondiceriana ), has so large a pouch under the throat, 
(which is quite wanting in the other sex,) that it has 
been separated as a genus under the name of Sitana . 
The Common Stellio (Lac. stellio ), which was for¬ 
merly much esteemed for its medical qualities, has 
bands of large spines round its tail. The Trapeli or 
Mutable Agamse, so called, from the rapidity with 
which they change the colour of their skin, are mostly 
armed with irregular spine-like scales, as the Cape 
Agama (Trapelus hispidus ), the Yellow-striped Agama 
(Agama atra ), and the Mutable Agama (Agama 
ruder at a). 
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 eared 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 
ROOM X, 
Nat. Hist. 
