44 MR. D. M. S. WATSON ON THE 



The middle groove of this pa,rt of the palate becomes narrower 

 as it is traced backward, but remains deep. Its hinder end is 

 separated from the lateral grooves by triangular raised areas, 

 which are roughened, but seem not to bear teeth. 



The internarial bar is continued back into this part of the 

 palate as a narrow slip separated from the pterygoids by a pair of 

 open and very obvious sutures. These sutures rapidly approach 

 and fuse, being continued backwards by an obvious median suture 

 for about 5 mm. This open suture, with a visible strip of matrix 

 in it, then suddenly ends and is with certainty not continued 

 backward in the middle line. It is, however, apparently replaced 

 by a pair of much less obvious sutures, between an overlapping 

 median bone and the pterygoids, which pass outward to the 

 margins of the median groove and seem then to be continued 

 backward by still less obvious sutures running along these 

 borders. Further back the wide, essentially flat palate gives 

 origin to the descending flanges. The ectopterygoids are separated 

 by obvious sutures and are comparatively small bones not taking 

 any large part in the flange. 



The palate of Gorgonops thus seems to show large pterygoids 

 reaching forward to the posterior naresand widely separating the 

 palatines, which are small bones simply continuing the ectoptery- 

 goids forward. In that part of the palate which lies in front of 

 the transverse flanges the pterygoids do meet each other for a 

 very small distance in the middle of their length, but posteriorly 

 are separated by a median vomer and anteriorly by the posterior 

 end of the internarial bar which is clasped between their distal 

 ends. There is no evidence to show whether or not these two 

 median bones are really separated, but as the anterior passes 

 dorsal to the pterygoids, whilst the other overlaps their ventral 

 surface, there is great probability that they do not represent parts 

 of the same element. 



Scymnognathus whaitsi Broom, Proc. Zool. Soc. 1912, p. 861. 



Type : a figured skull, nearly complete, but considerably 

 crushed and showing little of the structure. Other imperfect 

 skulls and other bones. 



The individual of which, under the name of Scymnognathus 

 whaitsi, I described the lower jaw (1912) and the br-ain-case and 

 occiput (1914), does not belong to this species, and is described in 

 this paper as a new genus and species. There are in the British 

 Museum three specimens of S. whaitsi: — R. 4053 collected by the 

 Rev. J. H. Whaits, as a very large number of small fragments 

 which, fitted together, form a skull from the front of the orbits 

 backwards with the pro-atlas and atlas in position, the anterior 

 end of the snout and a mass of separate fragments representing 

 the major part of the face ; of these a small bit of the posterior 

 part of the palate is of great morphological interest. The 

 back of the skull built up from these remains is quite un- 

 distorted and has been very completely developed, now showing 



