Dec. 1915. ON REPTILES AND BATRACHIANS FROM 241 
THE COAST AND ISLANDS OF SOUTH-EAST SIAM. 
11. CALorEs EMMA, Gray. 
Flower, P.Z.S., 1899, p. 641; Mocquard, Les Reptiles de l’Indo- 
Chine, p. 26 (1907) ; Robinson and Kloss, Journ. F.M.S Mus., V., 
p. 154 (1915). 
5 specimens. Koh Chang and Klong Yai, 8. E. Siam; Ok Yam, 
Franco-Siamese Boundary on coast. A marked white lateral band 
is present in an adult and an immature specimen. 
12. PHYSIGNATHUS MENTAGER, Giinth. 
Flower, P.Z.S., 1899, p 641. ; Mocquard, Les Reptiles de l’Indo-Chine, 
p. 27 (907). 
A large individual of this species was obtained at Klong 
Menao. 
Total length 896 mm., snout to vent 251. In an example of 
about half the size found on Koh Kut tne colouration was much more 
brilliant than in the older one. General colour above, brownish green, 
darkest on the head ; body with 3 broad diagonal bars of paler blue- 
green edged with brown; tail pale isabelline with brown bands ; hind 
legs above greenish brown. Underside of body, tail and forelimbs white, 
with a bright blue tinge in places ; chest, patches on sides, under sur- 
face of legs, bright emerald-green ; upper labial scales’rose-pink washed 
with green, lower labials and sub-labial row of scales rose-pink, the 
latter edged with black; throat reddish yellow. Ivis brown with an 
inner golden ring round the pupil. 
This species, which is known from Siam, differs mainly from 
P. cochinchinensis of Cochin-China, in the possession of a lesser 
number of lateral or molar teeth, and in the presence of eleven large 
sub-labial scales instead of only six or seven. 
The individual referred to above from Koh Kut, was kept alive 
for some time. It was a very sluggish creature, sitting about on the 
ground or in a tree, quite motionless, for most of the day. It never 
attempted to bite when handled. It was fed upon fish, meat, worms 
and insects. It was never seen to take food of its own accord, but on 
scratching its jaws would open its mouth.and then take whatever was 
given it. Its power of changing colour was very slight, and varied 
only from light to dark. When running fast over ground, its action 
was bipedal, the fure limbs being folded back along the flanks. A 
young specimen of this lizard has been recently taken at Muak Lek, 
