THE SKULL. 



[CHAP. 



is continued forwards in the same line by the basifacial 

 axis. The pituitary fossa forms no distinct depression, and 

 there are no posterior clinoid processes. The ossified 

 portion of the mesethmoid {ME) is extensive, and termi- 

 nates anteriorly in a nearly vertical line. The vomer ( Vo) 

 is very shallow from above downwards. The turbinal 



Fig. 66 — Section of the skull of the Thylacine (Thylacinns cynocepkalus), \. 

 MT maxilloturbinal ; E T ethmoturbinal ; ME ossified portion of mesethmoiu ; 

 Fr frontal; Pa parietal; SO supraoccipital ; ExO exoccipital ; Per periotic ; 

 BO basioccipital ; Sq squamosal ; AS alisphenoid ; BS basisphenoid ; OS orbito- 

 snhenoid; PS prespheiioid ; /"/pterygoid; PI palatine; Vo vomer; Mx maxilla ; 

 PMx premaxilla ; cd condyle of mandible ; a angular process. 



bones resemble generally in their extent and disdosition 

 those of the Dog. 



Externally the conformation of the zygomata, temporal 

 fossae, orbits, maxillae, premaxillae, and nasals are strikingly 

 similar to those of the Dog; but the lachrymal bone of the 

 Thylacine is larger both within and without the orbit, and 

 it has one perforation within, and either one or two just 



