l6 BAUR. [Vol. VII. 



tals. The nasals are represented by the expanded thin portion 

 which overlaps these processes. The whole arrangement is like 

 that in Varanus. The premaxillary contains four strong teeth. 

 From the lower anterior end two processes extend behind to 

 join the inner anterior part of the maxillaries and the vomers. 

 The anterior upper part of the premaxillary contains six vas- 

 cular foramina. The following connections exist : maxillaries, 

 frontals, vomers. 



The Turbinals. 



I did not find any trace of these bones, but they were doubt- 

 less present in the animal. 



The Maxillaries (Figs. 15, 16). 



The maxillaries are strong bones, the general shape of which 

 is best seen in the figures. Posteriorly they show two proc- 

 esses : an upper, slender one {a), which fits in the deep groove 

 of the prefrontal ; a lower, broader one {b), ending in a sharp 

 process, which joins the prefrontal (lachrymal), jugal, and ecto- 

 pterygoid. In front the maxillary is connected loosely to the pre- 

 maxillary. The inner face of the bone shows distinct faces for 

 the vomers and the palatines, very much as in Varanus. There 

 are twelve teeth in each maxillary. There are ten dental 

 foramina corresponding to the nine or ten front teeth ; a num- 

 ber of smaller foramina are found above these, in the region of 

 the nasal opening. The maxillaries are connected with the 

 following elements : naso-premaxillary, prefrontal (lachrymal), 

 jugal, ectopterygoid, palatine, vomer (turbinal). 



The Pterygoid (F'xg. 17). 



The pterygoid is a very large bone, resembling in general 

 the same element in Varanus. The shape is seen in the figure. 

 The principal portion of the bone is that which contains the 

 teeth (12, 13). It extends from the posterior part of the palate 

 behind the basipterygoid processes of the basisphenoid, forming 

 a very distinct process. The posterior branch joins the quad- 

 rate. It is strong. The distal end shows a very marked, rough 

 face on the outer side, for the ligaments to attach it to the 

 quadrate. The outer branch joins the ectopterygoid. The 



