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 Australian species described by Messieurs Dumeril and Bibron.  It agrees with the former in the disposition of the palatine teeth.

HELIOPORUS, Gray.

Head short, swollen; eyes large, convex; palatine teeth in a straight interrupted ridge between the two internal nostrils; teeth very small; body swollen; skin of the back minutely granular, of the belly smooth; legs rather short; toes 4.5, short, warty beneath, quite free; the hind wrist with a large, oblong, compressed, internal tubercle; the base of the inner finger with a conical wart, ending in a small acute bony process; tongue large, entire behind.

This genus has many of the characters of Cystignathus, but differs from it in being warty and swollen, and in having short toes like a toad.

94.  Helioporus albo punctatus, t. 1 f. 2.

Lead-coloured (in spirits) with white spots; beneath dirty white, with some small white warts at the angle of the mouth; legs smooth.

Inhabits Western Australia.

103.  Hyla Adelaidensis, Gray, t. 8 f. 2.

Slender; fore-toes quite free, hinder toes webbed to the last joint; (in spirits) gray-blue, with a series of small oblong tubercles; the sides purple-brown with a white streak from the underside of the eyes to the shoulders; sides of the belly and region of the vent purplish, with small white spots; the hinder side of the thighs purple-brown, with three large oblong white spots; belly and under side of thighs granular; chin white, brownish dotted; palatine teeth in two roundish groups between the internal nostrils.

Inhabits Western Australia.

104.  Hyla binoculata, Gray, t. 8, f. 1.

Slender; fore-toes quite free; hinder toes webbed to the last joint.  Grayish white (in spirits) with a series of very small, indistinct, oblong tubercles, with a dark streak from the nostrils to the shoulder, enclosing the eyes, and a white streak below it from the underside of the eye; sides purplish, with small white spots; back of the thighs purple, with two yellow spots; belly and underside of thighs whitish, granular.