(4°3) 



Fig. 229. Diagrams of skulls of A, eosuchian, B, 

 pseudosuchian, showing the plan of the diapsid skull. 

 Lettering as Fig. 214. //. lower temporal fossa; pi. pre- 

 orbital fossa; sf. upper temporal fossa. (From Goodrich.) 





<U 



J 



Fig 230 Skull of Youngina. Lettering as Fig. 214. (After Romer, Vertebrate Paleontology , 



Chicago University Press.) 



