184 THE SKULL. [chap. xi. 



any floccular fossa. The mastoid portion is very small, and 

 does not appear on the surface of the cranium. There 

 are no paroccipital or postglenoid processes. At the bottom 

 of a deep fossa between the squamosal, exoccipital, and tym- 

 panic, the tympanohyal is distinctly seen, with the stylo- 

 mastoid foramen to its outer side. The exoccipitals are 

 not perforated by a condylar foramen, neither is the ali- 

 sphenoid perforated, but it is grooved in front for the 

 foramen rotundum, and behind for the foramen ovale. 



The mandible is of a very peculiar shape. The ascending 

 portion of the ramus is high, and terminates in a rather small 

 rounded condyle, wider from side to side than from before 

 backwards. The posterior border is thick, but rounded off 

 gradually into the inferior edge, without any projection at 

 the angle. The coronoid process is compressed, and but 

 very little elevated. The horizontal portion is very massive 

 and rounded to support the great molar teeth ; it unites 

 with its fellow in front in a narrow, prolonged, spout-like 

 symphysis. 



The stylohyals are forked at their upper extremity, the 

 posterior process being greatly developed. They taper 

 below to a point which is connected by a long ligament with 

 the basihyal. The thyrohyals are long, compressed, and 

 ankylosed to the basihyal. 1 



1 See A. H. Garrod. Proc. Zool Soc. 1875, p. 365. 



