IN THE CARNIVOllOUS BINOCEPHALTAN REPTILES. 



6G9 



The quadrate is large, and extends far up inside of the 

 squamosal. It has a large internal a,nd anterior ]n'ocess which 

 articulates with the posterior process of the pterygoid. 



The occiput is fairly similar to that of the typical Dinocepha- 

 lians such as Jformosattrns figured by Watson. There is a broad 

 interparietal, and the tabular is large and extends down between 

 the sf{uamosal and the supraoccipital. A fairly well developed 

 stapes can be seen in position. 



The palate is beautifully preserved in specimen B. The 

 prevomers are very large bones which extend nearly hnlf of the 

 whole length of the palate. The palatines run along the inner 

 sides of the maxillpe and pass backwards to meet the prevomers, 

 the pterygoids, and the ectopterygoids. The ectopterygoids are 

 relatively small, and are situated as shown in text-figs. 6 and 4. 



The pterygoids are larger and peculiarly twisted bones. The 



Text-fiffure 7. 



Occiput of DinojpJionetis ingens, gci). ct sp. nov. About \ nat. size. 

 Entirely dvawu from Spec. 15. 



anterior part of the palate formed by the prevomers, the palatines, 

 and atiterior parts of the pterygoids passes backwards and doAvn- 

 wards as far as the huge pterygoid transverse processes. Pere 

 the pter3'goids bend back on themselves nearly at right angles, 

 and form processes which pass upwards and backwards to articu- 

 late firmly with the quadrates, much as in Sphenoclon. 



On the base of the skull between the posterior processes of the 

 pterygoids is a typical Therapsid vomer or " parasphenoid " as it 

 is called by most writers. 



DtihArtamus vandeebyli, gen. et sp. nov. 

 This remarkable new type is founded on some skull fragments 

 discovered at Abraham's Kraal by Mr. W. van der Byl, whose 

 keen interest in palsEontology has resulted in the discovery of 

 quite a considerable number of new types. I have much pleasure 

 in associating his name with the find. 



