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296 DR. J. E. GRAY ON STERNOTHERUS ADANSONII. [June 28, 
2. Notice or A New VARIETY OF RHODONA PUNCTATA FROM 
THE Swan River. By Dr. J. E. Gray, F.R.S., ere. 
Mr. Edward Gerrard has brought to me a Lizard from the Swan 
River, which differs considerably from the common form of Rho- 
dona punctata*, indeed so much so that I was at first inclined to re- 
gard it as a new species of that interesting genus ; but on reconsider- 
ation, as it only differs in the distribution of the colours, I think that 
it is better to regard it as a variety. It may be named after its dis- 
coverer, Rhodona punctata, var. gerrardii. The body white, with 
three broad black streaks, which are continued from the head to 
rather beyond the base of the tail; each of the streaks is as wide as, 
or rather wider than, two-thirds of two series of scales. The two 
outer streaks commence on the side of the nose, and are continued 
across and along the eye and down the side of the body ; the central 
vertebral streak commences at the back of the head. The three 
streaks are continued on the tail; but they become wider, and are 
broken up into spots, which have some more or less distinct white 
streaks acrossthem. The upper surface of the hind thighs are black- 
spotted, the spots forming a kind of streak; the chin, belly, and 
under part of the tail are white. 
Hab. Swan River. 
3. Nore on STERNOTH-ERUS ADANSONII FROM West AFRICA. 
By Dr. J. E. Gray, F.R.S., erc. 
(Plate XXIII.) 
On the 26th of May last year I read a paper before this Society 
on the species of Sternotheri then in the British Museum, and I 
divided them into sections or subgenera. In that paper I took no 
notice of Sternotherus adansonii, as that species was only described 
from a shell in the Paris Museum, said to have come from the Cape 
de Verd Islands, which had been noticed by Schweiger under the name 
of Emys adansonii. 
We have just received, through Mr. Dalton, two specimens of a 
species of the genus from the west coast of Africa, which is very 
distinet from any of the others, and, I have little doubt, is identical 
with the shell in the Paris Museum. As it is in a perfect state and 
well preserved, I think it well to give a new description of it. 
It belongs to the subgenus Notoa, the head being short, and the 
temples covered with a large triangular space of small polygonal 
shields. 
The hinder part of the sternum of the animal is narrower, and 
more like that of the genus Pelomedusa than any of the other species 
of the genus Sternotherus ; but the front lobe is distinctly moveable, 
and united by a straight suture. 
* Cat. of Lizards in B. M. (1845), p. 89. 
