540 



ZOOLOGY 



SECT. 



orbit behind ; the upper one is formed from the parietal (par). 

 The facial region is comparatively short. The premaxilUn {i). max) 

 are not greatly developed. There are distinct paroccipital pro- 

 cesses (i). oc). The periotic and tympanic arc ankylosed together, 



■par 



s.oc 



' ^\ poc 

 ' oc.cortd 



•X 



Fir:. 1150.— Skull of Hyrax. Letters as in Fn;. 1132. In addition, vat. par. interparietal; 

 Iti. tympanic. The suture between the frontal and parietal has been >)y an error made to run 

 l)ehind the post-orbital process. 



Fig. 1157.— Section of skull of African Elephant (Elephas africanus), to the left of the middle 

 line. a. n. anterior nares ; ilE. mesothmuid ; p. a. iiosterior nares ; Vo. vomer. (After Flower.) 



but not to the squamosal. The tympanic {ty.) forms a bulla with 

 a spout-like prolongation. 



In the Proboscidea (Fig. 1157) the bones of the skull are of 

 enormous thickness, the inner and outer tables being separated by 



