RAT, A REPRESENTATIVE MAMMAL, 



111 



inCraorbitqf ri'ssurQ 



L 



acnma 



( 



-\--malar brocess 

 Molars 



-ZuQOTTiatlC 



1 suTl 



coronal suture 



•TumlDaniC' 

 — saqittal suluTQ 



3osT-turnbanlc hooK 



ateral tiaTt 



baramasloid brocess 



— occibital con^ule 



Occibital 



external occfJDital crest 



'?if;.e?.lv~^^"^i PJ ^^^ ^^^' dorsal aspect. (From Greene, Anatomy of the Rat, 

 iransactions of the American Philosophical Society, New Series, Vol. XXVII, 1935.) 



