AGAMA CiELATICEPS. 
inner toe of each foot very short, the second rather longer, the third and fourth 
equal in length and much longer than the second, the outer or fifth not quite so 
long as the second, all armed with short, slender, curved, and pointed claws ; 
the hinder extremities rather robust towards the body, slender towards the 
toes ; the inner toe very short, second considerably longer, the third about 
double the length of the second, the fourth considerably longer than the third, 
and the outer one, measured from base to point, is rather longer than the second. 
The scales of the upper and anterior portion of the head are flat, unequal as 
regards size, subovate, longitudinally keeled, and on the sides of the keels 
rough, from fine raised ribs or small tubercles. The canthus rostralis on each 
side sharp and formed of a line of keels ; the palpebral ridges also sharp, and 
consists of a row of scales projecting upwards and outwards, each over- 
lapping externally the scale immediately behind it. The scales immediately 
in front of the eyes are embossed like those of the forehead, their points acute 
or arched, and directed upwards, those below the eye and on the sides of the 
head above the upper lip subtriangular, their points directed downwards and 
backwards. Towards the eye the scales are very small ; towards the upper 
lip three or four rows, large, all keeled, and otherwise embossed. The small 
scales are separated from the large ones by a longitudinal row of aculeated 
scales, those towards the temples most prominent. The scales on the upper 
and posterior part of the head are flat, irregularly shaped, and, with the ex- 
ception of three or four on the temples scarcely keeled, in other respects like 
those on the forehead ; two of the keeled scales of the temples are so placed 
that the keels form a longitudinal line which extends from the hinder extre- 
mity of the prominent infra-orbital ridge to nearly the upper extremity of the 
ear-opening. Scales of the upper lip, exclusive of the rostral one, and of the 
lower lip, exclusive of the mental one, nine, not distinctly divided. On each 
side of the neck, between the ear and the shoulder, a longitudinal cuticular 
fold, and above it some small protuberances, which, like the fold, are studded 
with small, conical, longitudinally ribbed scales. Scales of the back and sides 
triangular, keeled, and somewhat embossed ; the majority of them are of nearly 
the same size, the others are larger, project more or less outwards, and ter- 
minate in spinous points. Four longitudinal rows of these scales exist on the 
back, two on each side of the dorsal line, a number of others are irregu- 
larly scattered between the lines and on the sides of the body. Scales of the 
tail somewhat triangular, strongly keeled, and arranged in more or less regular 
rings, the keels of some of them towards base are very prominent and 
prolonged ; these scales form four short longitudinal rows, two of which are 
