A NEW FOSSIL REPTILE. QO7T 
side of the lower jaw, not much depressed, and apparently formed 
partly by the ectopterygoid, which bears no teeth. In this region 
there are two small depressions which may be foramina. 
A very remarkable feature is the very large size of the inter- 
pterygoid vacuity ; it is probable that the pterygoids do not meet. 
The palatine is a bone which bears a single dentigerous ridge 
directly continuing the middle one on the pterygoid ; where the 
two bones meet there is a small gap with no teeth; the anterior 
end of the palatine seems to show a natural border at the back of 
the internal nares. 
The maxilla is not well shown, but in its anterior portion 
bears a single row of very closely-set teeth which are wider from 
side to side than they are long; posteriorly the teeth are small, 
separated, and circular. The maxillary teeth seem to be shee 
codont, and are very short and blunt, being directly apposed to 
those of the lower jaw. 
The quadrate is shown on the left side as a rather thick plate 
curved lateral ly, so that its inner border comes into contact with 
the front face of the posterior ramus of the pterygoid, and its 
thin outer border forms part of the outer side of the skull. 
Lying to the outside of the quadrate, but with its thin posterior 
border within that bone, is seen the lower edge of a bone which is 
very short antero-posteriorly. This bone can only be a quadrato- 
jugal or a squamosal. Tightly applied to the outer surface of 
this bone is the extreme tip of another, which might be a 
squamosal if the other be a quadratojugal. 
On the same side, lying in close relation to the posterior end of 
the maxilla, is an ibe shaped bone which can only be the jugal; its 
border all round seems to be a natural one. From its curvature 
it is certain that the long limb cannot have reached back to the 
quadratojugal, but formed the back of the orbit, which must 
have been very large. As the squamosal and quadratojugal are 
in their natural “position and the jugal is displaced, it seems 
certain that there was no lower temporal arcade and that the 
temporal region was cut away from below, as in lizards. 
The lower jaw is in place and the left side of the palate is 
perfectly preserved, so that there is no difficulty in making a 
restoration of the palate. In such a restoration the pointed 
shape and width of the skull are very noticeable, as are the 
enormous interpterygoid vacuity and the fact that the articular 
region of the quadrate lies far in advance of the basioccipital. 
"The lower j jaw of the right side is perfectly preserved and fairly 
well exposed. There is a small splenial entering the symphysis 
and overlapping the angular behind ; the rather larger dentary 
overlaps the outer side of the same bone. The angular is a large 
boat-shaped bone forming the bottom of the jaw behind. ‘The 
surangular and articular are not exposed, but on the left side a 
short, high, very lizard-like coronoid process lies outside the 
pterygo-transverse process. 
The two rami are only loosely connected in front. 
