HORN EXPEDITION—AMPHIBIA. 
159 
The lips are bordered with papilla^ which are numerous at tlie interval 
between the upper and lower series of labial teeth. The papilUe are absent in the 
median anterior part; at either side of this and in the median posterior region 
they are arranged in a single series. 
2 
Series of labial teeth g- The second anterioi- and first posterior row are 
somewhat more broadly interrupted in the mid-line than in H. i-nhella. 
Tlie upper part of the body is dark with darker mottlings ; between the eye 
and the hind-limb is a lighter part on which the mottlings .show distinctly. The 
ventral surface is pearl-coloui’ed with no mottlings. The hinder half of the 
muscular part of the tail has strongly marked mottlings, and the crests of the 
tail have a dark network which may be strongly marked. 
The following are the dimensions of the specimen figured :—Total length, 
52 mm.; length of body, 22 mm.; length of tail, 30 mm.; width of body, 14 mm.; 
height of tail, 11 mm.; .spiraculum from end of snout, 12 mm.; spiraculum from 
centre of eye, 9 5 mm.; nostril to tip of snout, 4 mm.; snout to centie of eye, 
7’5 mm. 
Distribution. —This species has been previously recorded from northern parts, 
such as Ports Essington and Denison and Cape Yorke, from the Peak Downs and 
the Clarence River. When recording it from an inland part of New South Wales 
Mr. Fletcher speaks of “ the unexpected occurrence of L. ornatus and H. iesueurii, 
both of which, from previous records, would appear to be coastal species.”* It will 
thus be seen that Z. ornatus has a comparatively wide distribution. In Central 
Australia it extends from the .south of Charlotte Waters all up the Fiidce basin to 
the Alice Springs and to the west in the James Range, and is also found on the 
south side of the George Gill Range. 
Habits. —It is distinctly, as Mr. Fletcher surmised from its structure,! a 
burrowing form, but yet its habits in this respect differ considerably from those of 
Chiroleptes platycephalus. 
In the adult form it is always found in i’elati\ ely soft, sandy ground, most 
generally in the beds of creeks which arc dried up, but in which, after digging 
down for a short depth, the sand is more or less damp. 
It does not make a permanent burrow, but appears to come to the surface in 
the cool of the night and to remain hidden in the sand perhaps a foot or more 
* Vol. V., Proc. Linn. Soc. N.,S.\V., 1890, p. 672. 
t Vol. VL, Proc. Linn. Soc. N.S.W., 1891, p. 271. 
