142 Une Jals IGBTs 
limits of the inferior openings must lie at least one and one-half 
inches posterior to the rear border of the superior nares. 
Palatine joramina.—The small palatine vacuities follow in order. 
They are not over one inch in length by one-fourth inch in width, 
and as has been stated are enclosed by the palatines and transverse 
bones. 
In the median line there exists a cordiform opening with a length 
of one and three-eighths inches and a maximum width of one and one- 
eighth inches. The apex of this opening is directed anteriorly and 
separates the vomers for a short distance. Behind the vomers the 
pterygoids bound the opening. The basipterygoid processes of the 
basisphenoid lie below and behind the opening; whether they form 
part of its margin is not known. The vertical anterior plate of the 
basisphenoid perhaps partly divided this opening in life, but if so 
it has since been forced to one side. 
Posttem peral jossa.—Above the proximal portion of the exoccipital 
lies the posttemporal opening. As seen from behind this is a small 
opening nearly an inch long and one-fourth inch high. Immedia- 
diately above the exoccipital the fossa is roofed by the squamosal; 
in front of the exoccipital it pierces the roof of the mouth and 
communicates with the great cavity of the skull. On the outer side 
the border is formed by the quadrate behind and the pterygoid in 
front. The anterior border is probably formed by the pterygoid 
and the posterior wing of the parietal, which also forms the inner 
border. 
Injratemporal jossa—This forms a large irregular opening on 
the under surface, bounded proximally by the pterygoid and palatine, 
distally by the quadrate, quadratojugal, jugal, and maxilla. 
THE LOWER JAW 
Only the posterior part of one mandible is present, but this shows 
strong belodont affinities and differs markedly from that of the croco- 
diles. In general outline it resembles the mandible of Belodon plien- 
ingeri figured by von Meyer (Paleontographica, Vol. XIV, Pleo 2) 
The crest of the surangular is much higher than in the Crocodilia and 
the portion behind the articular surface is much shorter than in that 
order. It probably does not extend more than an inch behind the 
