more ovate and convex than Dr. Shaw's specimens. They are 7 inches long
by 6 wide. It may be a particular variety, or they may become more ovate
as they increase in size, The sternal shields (in specimens preserved in
brine) are pale yellow, with black edges.

86. Chelodina oblonga, t. 7.

Shell oblong, rather contracted in front, with a broad impression on the
middle of the back; back olive brown, with irregular anastomosing lines
on the shields; beneath reddish-yellow. The marginal plates longer than
broad, the second larger than the first and third; and rather angularly
produced in the middle of the inner edge, opposite the suture between the
first dorsal and first costal plate; the sternum high, flat, strongly and
sharply keeled on the sides.

Inhabits Western Australia.

This species is at once known from Chelodina longicollis by the form of
its high, flat sternum, which is strongly keeled on the sides, and by
this part being of a uniform reddish colour, without any dark margin to
the plates; the hinder part of the sternum is only slightly concavely
truncated, and not deeply notched.

It is also known from that old well-known species by its oblong depressed
form, and by the form of the marginal plates, and especially from the
second and eleventh marginal plates on each side being placed more
forwards, so that the centre of their inner edge is opposite the suture
of the first and last costal plates with the dorsal ones; instead of
their front margin, as is the case with all the specimens of Chelodina
longicollis I have seen.

This species grows to a large size. Mr. Gould brought a specimen which he
gave to Mr. Bell, which is 11 inches long, and the neck is nearly equally
long, very thick, and studded with large warts; the head is broad and
depressed, covered with a thin skin, like a Trionyx, and marked with
small thin scales.

92. Cystignathus dorsalis.

The palatine teeth in a single large straight line, just behind the inner
nostrils; tongue large, slightly nicked behind, the tympanum nearly hid
under the skin; gray-brown (in spirits) marbled with dark irregular
spots, with a white streak down the middle of the forehead and front of
the back; sides pure white, spotted and marbled with black; beneath
white; toes elongate, slender, tapering; back part of thighs brown, white
speckled.

Inhabits Western Australia. Mr. Gould.

This species is very distinct from C. peronii and C. georgianus, the two
Austra