6 Kansas university quarterly. 



SKULL. 



The skull was originally complete and in wonderful preservation 

 having suffered but little from compression. Unfortunately the 

 posterior inferior portion has been so injured that its characters 

 are mostly obliterated. 



Pariotais. The parietals are elongate, narrow, gently arched bones, 

 separated from each other by a distinct suture, and extending back 

 over the supraoccipital for a considerable distance. Taken together 

 the two bones, exclusive of the supraoccipital projection, form an 

 elongated parallelogram, with a rounded boss or eminence in the 

 middle. in front. They send down a rather narrow fore and aft plate 



Froiitais. to join the pterygoids. The frontal bones are irregular 

 in shape, though their entire form cannot be made out with certainty, 

 owing to the obliteration of a part of the suture between them and 

 the prefrontals. Posteriorly they unite by a nearly transverse, some- 

 what concave suture with the parietals, and, by an oblique suture run- 

 ning to near the middle of the superior orbital margin, with the post- 

 frontals. The free orbital border is short and gently emarginate. In 

 front, the transverse suture separating them from the prefrontals is 

 very distinct on the outer two-thirds, but obliterated on the inner 

 part. A very careful examination here shows, apparently with cer- 

 tainty, that the suture is not continued inwardly on the same line, but 

 seems to turn forward and a little outward to join the nasa>suture, as 

 is indicated in the drawing, thus excluding the prefrontals from meet- 



Prefi-oiitais. ing in the middle line. With this interpretation, the 

 prefrontals are small, and have an irregularly four-sided shape. Their 

 orbital margin is even shorter than that of the frontals. The nasal 

 suture is transverse; the maxillary suture oblique and gently con- 

 cave. The superior aspect of each bone is on one plane, slop- 



Xasal8. ing outward and forward. The nasals are united by 

 well-marked sutures, and are subquadrate in shape, the maxillary and 

 frontal sutures, which are nearly of the same length, meeting in an 

 acute angle. There may have been a slight notch in the middle 



in front. The bones together form a very gentle arch. The premax- 



Premaxiiiariew. illaries show distinct sutures, both median and lat- 

 eral, the latter nearly at the outer margin of the narial opening and all 



Postfrontais. parallel. The postfrontals form an extensive arch, to- 

 gether with the parietals, covering the temporal fossse. Their union 

 with the jugals is not evident, but seems to be above the middle of 

 the posterior orbital margin. The postfronto-squamosal suture is 



Maxiiiaries. likewise not distinct. The lower margin of the max- 

 illaries form a rather thin, somewhat sinuous edge. The junction 

 with the jugal it is impossible to trace. On the posterior part from 



