THE TYPICAL BONY SKULL. 



26 



seg:ments of which the basisphenoid and presphenoid form the 

 basal parts, are membrane bones, and are disposed ia tvva 

 pairs. The posterior are the parietals, the anterior the fron- 

 tills y and the segments which they complete are respectively 







O i 



H 9 



Eh 



n 



O 

 ■< 



to 



I" 





Pbeteostal. 



Branchial apparatus. 



Hyoldean apparstos. 



Eh 



Mandibular Suspenaorium. 





4 

 s 



□Q 



o 

 to 



to 



to Lg 



