496 



ESSENTIALS OF ZOOLOGY 



A. 



ms 212— A Face and skull of Pithecanthropus erectus. B, Face and skull of 

 Eolnfkrlfus dat^sSS ^Udapted from McGregor Fr^m r^^e ^^oZugou Earth 

 and Man, edited by G. A. Baitsell and published by Yale University Fress.) 



