it

has claws also on these parts resembling those of birds of prey. Its
body is rough all over, like that of the crocodile. Its eyes are
situated in a hollow recess, and are very large and round, and are
enveloped in a skin resembling that which covers the entire body;
and in the middle a slight aperture is left for vision, through
which the animal sees, for it never covers up this aperture with the
cutaneous envelope. It keeps twisting its eyes round and shifting
its line of vision in every direction, and thus contrives to get a
sight of any object that it wants to see. The change in its colour
takes place when it is inflated with air; it is then black, not unlike
the crocodile, or green like the lizard but black-spotted like the
pard.