306 Transactions of the Royal Society of South Africa. 
sion of the South African Museum (Cat. No. 5875) it has been possible to 
display the general features of the palate and basicranium, and to show 
that the form must be classed among the Bauriamorpha. 
The palatal aspect is similar to that of Bauria, except that it is probable 
that the secondary palate is more fully formed than in that genus. The 
septum dividing the posterior nares was figured by Broom. There is a 
large suborbital fossa, bounded posteriorly by the pterygoid and laterally 
by a bone which expands forwards and is probably the ectopterygoid. 
The bone substance is very soft and sutures are usually indistinguishable 
in a sandstone matrix such as this fossil possesses. There is a large cordate 
interpterygoid vacuity. 
The quadrate ramus of the pterygoid meets the quadrate, and between 
it and the paroccipital there is a very considerable space. 
The epipterygoid is a flat bone, fairly narrow in the middle, but expanded 
at each end, resting on the quadrate ramus of the pte^goid and touching 
the parietal. It is far more like the epipterygoid of the Therocephalia than 
that of the Cynodontia. 
The basisphenoid is broad, and apparently extends in the middle line 
to the back of the interpterygoid vacuity. Near the front it is pierced by a 
single circular foramen, probably the foramen for the carotids. It forms, 
as usual, part of the border of the fenestra ovale, which is closed by the 
stapes. The stapes are dumb-bell shaped bones, the outer end lying between 
the paroccipital, quadrate, articular, and pterygoid. 
The paroccipital is shallow — possibly on account of the post-mortem 
flattening of the skull — but laterally is broad from back to front ; its under 
surface is provided with a broad, shallow groove. Its inner end forms 
the border of the large foramen jugulare, whilst medial and slightly posterior 
to the latter is a smaller opening for the exit of the Xllth nerve. 
No other details are visible, but enough is seen to place this form in the 
Bauriamorpha, to which the ill-defined features of the upper surface of the 
skull would also assign it. 
Addendum. 
Since the above description of Cynidiognathus longiceps was drawn up, 
Dr Broom has informed me in a verbal communication that the bone hitherto 
known as basisphenoid in Therapsids (and so described in this paper) is, 
in his opinion, the parasphenoid. In an immature Gorgonopsian skull from 
the top of the Gistecephalus zone, whose basicranial region he has sectioned, 
he finds the basisphenoid existing as two small ossifications lying in front 
of the basioccipital — quite distinct from it and from the bone which sends 
back a thin plate to underlie the basioccipital and which is anteriorly clasped 
by the pterygoids, extending forwards above them as a median septum bone 
