540 



ZOOLOGY 



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

 The facial region is comparatively short. The premaxillaa {p. max) 

 are not greatly developed. There are distinct paroccipital pro- 

 cesses (|). oc). The periotic and tympanic are ankylosed together, 



=/^ 



par 



inl.T?a/' 



-p.oc 

 oc.corvd 



Fig. 1156. — Skull of ll3rrax. Letters as in Fig. 1132. In addition, int. par. interparietal ; 

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

 behind the post-orbital process. 



Fig. 11.57.— Section of skull o£ A&ican Elephant (Bephas africanus), to the left of the middle 

 line. a. 7i. anterior nares ; ikOs'. mesethmoid ; 31. n. posterior nares ; To. 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 



