524 



ZOOLOGY 



SECT. 



tubular, and are almost, or quite, encircled by bone. The face is 

 laterally contracted in front of the orbit and again expands 

 anteriorly. The mandible is extremely massive ; anteriorly the 



p.oc 

 oc.con-d 



FIG. 1168. Skull of Hyrax. Letters as in Fig. 1144 ; in addition, int. par. inter-parietal; 

 ty. tympanic. The suture between the frontal and parietal has been by an error made to 

 run behind the post-orbital process. 







symphysial portion is greatly expanded to support the large incisor 

 and canine teeth. 



In the Hyracoidea (Fig. 1168) the skull shows affinities with 

 Rodents and also with Perissodactyles. The zygomatic arch is 



FlQ. 1169. Section of skull of African Elephant (Elephas africanus), to the left of the 

 middle line. an. anterior nares ; ME. mesethmoid ; pn. posterior nares : Vo. vomer. 

 (After Flower.) 



stout : it is formed mainly by the jugal (ju), which forms part 

 of the glenoid fossa. The post-orbital processes meet in some to 



