different species of Reptiles and Amphibia found in Australia. Since that
period the British Museum has received from the different travellers
various other species from that country. The lizards have been described
in the catalogue of the Museum collection, recently published, and are
being figured in the zoology of H.M.S. Erebus and Terror. Two of the most
interesting specimens lately received, belong to a new genus of frogs
which appear to be peculiar to Australia, which I shall now proceed to
describe:--

GENUS PERIALIA. FAM. RANIDAE.--Tongue nearly circular, entire; palate
concave, with two groups of palatine teeth between the orifices of the
internal nostrils; jaw toothed; head smooth, high on the side; mouth
large; eyes convex, swollen above, tympanum scarcely visible; back rather
convex, high on the sides; skin smooth, not porous; limbs rather short;
toes 4.5, tapering to a point, nearly free, the palms with roundish
tubercles beneath; the fourth hind toe elongate, the rest rather short;
the ankle with an oblong, compressed, horny, sharp-edged tubercle on the
inner side at the base of the inner toe; the male with an internal vocal
sac under the throat.

This genus agrees with SCIAPHOS, PYXICEPHALUS, and PELOLATES, in having a
large, sharp-edged tubercle on the inner edge of the ankle, but it
differs from them at first sight, by the head and body being compressed
and high, the mouth very large, and the eyes convex on the side of the
forehead.

PERIALIA EYREI, t. 2. f. 3.--Olive, sides of the face, and body blackish
brown; face varies with white streak; the sides of body marbled with
unequal white spots; limbs brown and white marbled; under side of the
body whitish.

Inhab. Australia, on the banks of the river Murray.

PERIALIA? ORNATA, t. 2. f. 2.--Pale grey, back and sides, marbled with
symmetrical dark-edged spots, those of the middle of the back being
generally confluent, of the face elongate, band-like; the legs
dark-banded, beneath white.

Inhab. Port Essington.

Somewhat like DISCOGLOSUS PICTUS in appearance. The internal nostrils are
far apart, with an elongate group of palatine teeth level with their
hinder edges.

Taking advantage of the space of the plate, figures of the following
species from the same country, which have not hitherto been illustrated
have been added. They were described or noticed in the list before
referred to.

1. Cystignathus dorsalis, t. 1. f. 2. GRAY, ANN. NAT. HIST.