SOME CARNIVOROUS THERAPSIDS. 1035 
probably the supraoccipital and parietal. Lateral to its articu- 
lation with the paroccipital process the squamosal is very massive, 
and after passing directly outward for some distance finally 
curves round and forms part of the zygomatic arch. The front 
face of the lateral part of the squamosal is excavated for the 
quadrate and quadratojugal. 
The quadrate is a comparatively large bone with a trace of the 
pterygoid ramus in a slightly turned back area behind which the 
posterior end of the pterygoid passes. The lower margin of 
the bone is thickened to form the condyle, which, although its 
surface is destroyed, must have looked very much more forward 
than downward. 
The quadratojugal is a small bone completely fused with the 
quadrate at the lower margin and actually forming a good deal 
of the condyle. On the posterior surface it is seen to overlap the 
quadrate ; separating a good deal of its posterior surface from 
the squamosal between the two bones is a large foramen. 
In Arctognathus the quadrate is partially shown on one side, 
and relatively is considerably smaller than that of the earlier 
type described above. 
In Diademodon the quadrate as it has been described by 
Seeley, Broom, and myself, is very much smaller. It will be 
remembered that 1t is possible that there is a foramen through 
the quadrate of Diadenodon suggesting that even in that form 
there is a rudimentary and otherwise totally fused quadratojugal. 
The Palate of Lycosuchus ? 
In the British Museum there isa very large “ Therocephalian ” 
skull (R. 4100) from Vit. Kyk. Gouph, collected by T. Bain from 
the Tapinocephalus zone. 
This is perhaps not definitely determinable, as it is broken 
off through the canine, behind which it shows only one molar 
tooth. I can see no generic differences, in fact few differences, 
except that it is considerably larger, from the specimen of 
Lycosuchus vanderriti described by Dr. Broom. In any case it 
is unquestionable that it is closely allied to Scylacosaurus. The 
palate of this individual is very well but curiously preserved, 
having been cleaned by the weathering of a broken face which 
passes along the palate, having its mediai portion adherent to one 
block and the remainder to another. 
The basisphenoid is not completely shown, but has a very deep 
(2 ecm.) and narrow keel along its ventral surface. Although 
they are only incompletely exposed, iteis evident that the basi- 
pterygoid processes are the usual flat plates found in all South 
African “Carnivorous” Therapsids. It is clearly shown that the 
epipterygoid, which is a comparatively narrow but laterally 
flattened bone, articulates with the process. 
The pterygoid is the usual large triradiate bone ; it articulates 
with the basipterygoid process and sends a ramus pack to pass 
