REPTILIA : CASEA 



"5 



back a little, and that of the right a little forward. I have equalized 

 their positions in my drawings to correspond with the cotylar sur- 

 faces of the united mandibles. The upper and anterior borders 

 are quite perfect and the anterior part of the right jugal arch is 

 undistorted on the right side. Each posterior angle of the skull 

 roof is extended strongly backward, outward, and then downward, 

 and is attached to the posterior margin of the quadrate. Below 

 there is an interval between this extension and the neck of the 

 quadrate, which seems to be analogous with the quadrate foramen. 

 The postorbital bar is nearly vertical, with a gentle convexity out- 



Fig. 30. — Casca broilii. Skull, from the side, natural size. 



ward. It is rather narrow, about one-fourth the width of the orbits 

 antero-posteriorly. The orbits are very large; they look almost 

 directly outward and a little forward; they are a little longer than 

 high, and a little deeper posteriorly. Their anterior margins above 

 reach nearly as far forward as the front end of the maxillae. On 

 neither side is the narial opening quite complete, their superior 

 and posterior margins more or less broken away, but it is not 

 probable that they are much smaller than I have figured them. 

 The width of the skull in front, just in front of the orbits, is dis- 

 tinctly greater than the width between the front ends of the 

 maxillae immediately below, from which it follows that the anterior 

 part of the skull overhangs the teeth, and the nares are quite in- 



