Cope.] 1^4: pjay 15^ 



concave, and is marked with numerous irregular fossa?. The surface 

 has been evidently the seat of the insertion of something ; hut whether 

 it was entirely of a ligamentous character or whether some tegumentary 

 structure had its basis there I do not know. The superior border of the 

 temporal fossa is regularly concave towards the middle line, and regard- 

 ing the sagittal crest as restricted to the parietal bone, its truncate edge 

 is wider at the extremities than at the middle. The narrowest portion 

 of the crest is nearer the frontoparietal than the parietooccipital suture. 

 The temporal ridge is in regular continuation of the edge of the sagittal 

 crest, and becomes transverse in direction towards the orbital border of 

 the frontal bone. This border is broken ofl". 



The vertical temporoparietal suture does not run along a ridge as in 

 the 31. dur in as us, hut its superior portion is on a low, obtuse angle. 

 The frontoparietal suture extends posteriorly from the sagittal crest 

 downwards, much posterior to the direction it presents in the C. megalo- 

 pliysum, where its direction on each side is a trifle anterior to transverse. 

 Across the front the suture is coarsely serrate, difl'ering from the sutures 

 of the anterior border of the frontal bone, which are closely and deeph* 

 interdigitate, as in the G. 7negalop7iysum. The superficial median part 

 of the frontal is about one-third as long as the corresponding part of the 

 parietal. The nasomaxillary suture with the frontal is short in the 

 transverse direction, not reaching the temporal ridge on each side. The 

 frontomaxillary suture then becomes nearly longitudinal for a distance 

 of 50 mm. and then turns outwards for 25 mm. On the opposite side 

 the posterior border of the maxillary is more oblique, and extends from 

 the transverse m.edian portion divergent from the line of the temporal 

 ridge, forwards and outwards. The latter is probably the normal direc- 

 tion of the suture. The nasal bones are very narrow, but expand grad- 

 ually anteriorl3^ They do not terminate posteriorly in an acute angle as 

 they do in the C. megalopJiysum and M. durinasus (apparently), but are 

 truncate. The premaxillaries are also narrow at this point. Their pos- 

 terior extremities are broken off. The glenoid cavity presents down- 

 wards. The prespheuoid is plane below antcTOposteriorly and trans- 

 versely posteriorly, but is slightly convex below anteriorly. It is hollow. 



Measurements. mm. 



Length of supraoccipital triangle to occipitoparietal 



suture 80 



Length of parietal on middle line 60 



frontal " " " 35 



Width of supraoccipital at base of suj)ra()ccii)ital tri- 

 angle 124 



Width of base of cranium opposite supraoccipital tri- 

 angle 115 



" sagittal crest 18 



nasals at base 28 



" " 140 mm. anterior to base 50 



