344 



Br. R. Broom — The Palate of Theriodonts. 



tooth, as yet immature, as large as the second, and which I regard 

 as the 3rd canine. Behind the 3rd canine are seven small simple 

 molars. A minute canine in front of the large canine is figured by 

 Owen in Gorgonops, and it also occurs in another genus [Ictido' 

 saiiriis), which I am describing. 



••-....,...--^...J-- ' 



Eestoration of Palate of Scylacosaurus Sclateri. x '45. 



Mx, maxilla ; Fa, palatine ; F.inx, premaxilla ; Pi, pterygoid ; F.vo, prevomer ; 

 T.p, trauspalatine. 



The palate is quite unlike that of Galesauriis and Cijnognaihus, 

 and is only a slight modification of that found in the Khyncho- 

 cephalians and most other primitive reptiles. It will be more 

 readily understood by reference to the Figure than by description. 

 The interna] nares are situated well in front, and divided by the 

 paired ' vomers,' or, as they perhaps had better be called, prevomers. 

 These prevomers are of considerable size and form a large part of 

 the hard palate, and articulate posteriorly with the pterygoids. The 

 palatines articulate with the maxillaries along a line a little to the 

 inside of the molar teeth, and partly enter the posterior border of 

 the internal nares. The ptei'ygoids are of large size. In front they 

 pass forwards between the palatines to meet the prevomer, and form 

 a large part of the hard palate. They have well-developed ti-ansverse 

 processes, which are supported by rather slender transpalatines or 

 ecto-pterygoids. The posterior part of the palate is unknown, but 

 is probably as restored in the Figure. 



As the palate of Scylacosaurus and its allies differs so very greatly 

 from that of the typical Theriodonts I have proposed to constitute 



