152 
numerous slightly keeled scales, and one situated in the middle 
of the occiput appears to be rather larger than the others ; the width 
of the space between the bony orbits is very narrow; the canthus 
rostralis and the margin of the upper eyelid form one continuous 
sharp edge. The rostral shield is very low, like the upper labials, 
which are five in number. The nostril is very small, in a single 
shield, which is situated between the canthus rostralis and the first 
labial. The loreal region is a little concave, and covered with small 
irregular shields. The median shield of the lower jaw is subtrian- 
gular and longer than broad ; there are five lower labials on each 
side, the remainder of the throat being covered with imbricate and 
keeled scales. There is a small conical tubercle behind, and detached 
from the orbital edge; another similar tubercle is on each side of the 
throat below the tympanum; a series of tubercles proceeds from 
above the tympanum, and is bent inwards to the nuchal ridge. The 
tympanum itself is small and subcircular. There is no fold across 
the throat, but a transverse band of rather smaller scales. 
The trunk is rounded, in the female depressed ; a series of larger, 
keeled scales runs along the middle of the neck and back to the base 
of the tail, and forms a sort of dorsal crest ; the back and the sides 
are covered with small scales of unequal size and quite irregularly 
arranged ; they are intermixed with scattered, considerably larger 
scales, and these are distinctly keeled. The scales of the belly are 
imbricate, rhombic, more equal in size and more regularly arranged 
_and slightly keeled ; the preeanal scales are like those of the belly ; 
preeanal pores none. 
The ¢ail is very long, slender, rounded at the base, and covered 
on all sides with rhombic, keeled, imbricate scales; it is not verti- 
cillated. 
The upper parts of the extremities are covered with very large 
and strongly keeled scales; some scales on the hinder side of the 
femur have even two or three keels. The fore leg reaches to the 
loin, if laid backwards ; the hind leg, if laid forwards, nearly to the 
end of the snout. The fingers and toes are armed with strong claws, 
and-have the usual relative length. There are no femoral pores. 
The ground-colour of the upper parts is brownish; uniform in 
the females, variegated with darker in the males. Some of the large 
scales of the back appear to have been iridescent during life. The 
lower parts are uniform dull-yellowish. 
inches. lines. 
Motel eri aise, ahs Gentes f J01S spar eewigs 73 
Length of the head (to the tympanum).... 0 6% 
Greatest width of the head.............. 0. 
5 
Length of the trunk (to the anus).......- Lind 
iE REMAN shai cue ade ao kictsme ete oe sem OE. ee 
— of the humerus ................ 0 4 
——— of the fore-arm ................ 0 4 
——— of the fourth finger ............ 0 42 
——— of the first finger .............. 2) Sie 
——— of the entire fore extremity ...... 1 120 
