A NEW THECODONT REPTILE. 1075 
parietal is directed outwards and backwards, as in lizards and 
Sphenodon, and rests on the bone which I believe to be the 
tabular. 
The structure of the post-temporal region is a little difficult to 
make out, but as it is well preserved on ‘both sides the difficulty 
consists largely in distinguishing cracks from sutures, and I 
think there is practically no doubt but that the elements are 
as I have figured them. Whether my interpretation of them 
is correct is, of course, another matter. 
Forming the posterior border of the infratemporal fossa is a 
fair sized triangular bone, which [ believe to be the squamosal. 
It articulates above with the postorbital, and below it probably 
articulates with the quadratojugal. The quadrate is very largely 
hidden by it. 
With the posterior end of the jugal articulates an element 
which I believe to be the quadratojugal. Unfortunately its - 
posterior portion is not seen on either side. It cannot be a part 
of the element which I identify as squamosal. The relations of 
the quadratojugal, squamosal, and jugal are somewhat similar 
to those in Sphenodon. 
Along the upper and posterior side of the squamosal lies 
another element of considerable size, which I believe to be the 
tabular. In front it meets the postorbital, and its inner side is 
partly covered by the posterior process of the parietal. Posteriorly 
it articulates with the paroccipital (opisthotic). 
Behind the parietals and above the supraoccipital is a fair sized 
and certainly distinct interparietal. Possibly it is paired. 
The occiput, though fairly well preserved, does not show the 
limits of the various elements. The supraoccipital is low and 
broad ; the exoccipitals are probably small, and there are short 
paroccipitals directed backwards and outwards. Between the 
sides of the supraoccipital and the tabulars are a pair of narrow 
fosse. On the whole the resemblance of the occiput to that of 
the lizard is considerable, the presence of a distinct interparietal 
being the only important difference. 
The mandibles, though present and complete, have not been 
cleared of matrix, as it would be difticult to do so without 
injuring the teeth, and the presence of the mandibles renders 
it impossible to display the palate. 
For this new reptilian type I propose the name Youngina 
capensis, in honour of the late Mr. John Young, LL.D., F.G.S., 
Under-Curator of the Hunterian Museum, Glasgow University, 
to whose early assistance and kindly encouragement I am mainly 
indebted for my interest in paleontology. 
Though Youngina cannot be placed close to any previously 
well-known type, we can nevertheless give it a fairly definite 
place in the reptilian series. 
If we exclude the Cotylosauria, the Therapsida, the. Chelonia, 
the Ichthyosauria, and the Plesiosauria, all the remaining orders 
i 
