1030 MR. D. M. 8S. WATSON ON 
Now, according to Dr. Broom’s figure of the occiput of the 
type-skull of Bauwria, the basioccipital condyle is large and 
rounded, much more like that of Avctops than any other of the 
series described above. The fenestra lies far above the bottom 
of the occiput, looking directly backwards. There is no trace of 
the gradually developed triangular lower surface of the basi- 
sphenoid which is so characteristic a feature in Cynognathids. 
In fact, it seems quite certain that the basicranial region of 
Bauria is the product of an utterly different type of change from 
that which has led to that of Diademodon, and as the features of 
Text-figure 4. 
WW 
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HI 
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Await PEN 2 (i 
PNM 
Auli tl(l 
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The occipital and otic regions of :— 
A. Dimetrodon. 
B. Arctops willistoni. 
C. Seymnognathus whaitsi ? 
D. Diademodon. 
Viewed from below and the right side. 
Tub., Tuberosities of basisphenoid; Oc.C., Occipital condyle; X., Foramenjugulare ; 
B.Pt,, Basipterygoid process ; 7.Ov., Fenestra ovalis, 
