406 
APPENDIX. 
Inhab. Port Essington, near the Hospital, Dr. Sib- 
bald, R.N. 
The membranes are brown, nakedish; the tail is rather 
produced beyond the membrane at the tip ; the feet are 
small, and quite free from the wings. 
Male. Female. 
The length of the body and head 1.10 1.10 
,, fore-arm bone 1.11 1.10 
„ shin-bone 8 8 
,, ankle and foot 4 4 
II. In Captain Grey’s Travels in Western Australia I gave 
a list of the 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. Ranidce . — Tongue nearly cir- 
cular, 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 
