n a fleshy process of the
exact form and appearance of the spines they bear.

The scales of the underside of the body are of the same form as those of
the back, and are furnished with similar but smaller and less produced
spines. The back of the neck of the two specimens I have seen is
furnished with a large rounded protuberance like a cherry, covered with
large granular spinous scales, and armed on each side with a large
conical spine; but I do not know if this is common to the species or
merely accidental in these individuals; at any rate it adds considerably
to the singularity of their appearance.

I have named this genus, from its appearance, after "Moloch, horrid
king."

60. Moloch horridus, t. 2.

Pale yellow, marked with dark regular spots; sides and beneath with
black-edged dark red similar spots.

Inhabits Western Australia. The Honourable Captain G. Grey, and John
Gould, Esquire.

The marks on the body are very definite, but from the irregularity of
their form they are not easily described.

The lips are dark brown, with two streaks up to the small spines on the
forehead; there is a dark cross-band from the base of the two large horns
over the eyebrows, running behind, and then dividing into broad streaks,
one along each side of the centre of the back of the neck to between the
shoulders, crossing the nuchal swelling. In the middle of the back there
is a very large black patch nearly extending from side to side, and over
the loins are two oblong longitudinal black spots; the dark lines
commencing from the lower angle of each eye extend along the upper part
of each side to the upper part of the groin; the front of the fore- and
hind-legs, and the sides are marked with similar dark bands.

A dark band commences from the hinder part of the lower lip, merging in
the throat, and expanding out so as to be united together at the back
part of the chin. There is a large rather oblong spot in the centre of
the chest and the hinder part of the abdomen, separated from each other
by a large somewhat triangular spot on each side of the middle of the
abdomen.

Body 4 1/2 inches.

This is the Spinous Lizard exhibited by Mr. Gould at the meeting of the
Zoological Society in October 1840.

64. Tropidonotus mairii, Gray.

Olive, beneath pale olive, vertebral scales darker, slightly spotted;
labial shield pale, dark edged. The dorsal and lateral scales keeled,
placed in longitudinal series; the keels continued, eq