40 



THE MAMMALIAN ORDER PRIMATES [SECT. A 



;; Stage of Primate mammal (Order Primates). 



•'• "Insectivorous" stage (Super-order Archonta). 



-• Stage of generalized Eutberian mammal (Section Eutheria). 



5C Stage of generalized Metatherian mammal (Section Metatheria) 



Stage of generalized Therian mammal (Sub-Class Tberia). 



^C Stage of generalized Prototberian mammal (Sub-Class Prototberia). 



Stage of generalized Mammal (Class Mammalia). 



X Stage of generalized Reptile (Class Reptilia). 



)C Stage of generalized Amphibian (Class Ampbibia). 



X Stage of generalized Fish (Class Pisces) 



Fig. 16. 



