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A Classification of the Mammalia. 



Sub-class PROTOTHEBIA (Monotremes). Primitive egg-laying Mammals. 

 Examples, Ornithorhynohus (Duckmole). 

 Echidna (Spiny Ant-eater). 

 Proechidna. 



Sub-class METATHERIA (Marsupials). Mammals which carry their 

 young in a marsupium or pouch. 



Order Polyprotodontia. Incisors numerous, canines large, grinders 

 with sharp cusps. Carnivorous or insectivorous. 



Examples, Didelphys (Opossum). 

 Dasyurus (Dasyure). 

 Thylacinus (Tasmanian Wolf). 

 Myrmecobius (Banded Ant-eater). 

 Notoryctes (Marsupial Mole). 

 Perameles (Bandicoot). 



Order Diprotodontia. Fewer and unequal incisors, canines small 

 or absent, grinders with blunt cusps or ridges. Generally 

 herbivorous. 



Examples, Phascolomys (Wombat). 

 Phalanger. 

 Tarsipes. 



Phascolarctus (Koala, or "native bear"). 

 Macropus (Kangaroo). 



Sub-class EUTHEBIA. The highest Mammals. A true (allantoic) 

 placenta. Without a pouch. 



Order "Edentata." 



Examples, Bradypus (Three-toed Sloth). Forests of 



South America. 

 Choloepus (Two-toed Sloth). Forests of 



South America. 

 Myrrnecophaga (Ant-eater, or Ant-bear). 



Tropical South and Central America. 

 Dasypus (Armadillo). South America. 



Order Effodientia. 



Examples, Manis (Pangolin, or Scaly Ant-eater). Africa 



and Eastern Asia. 



Orycteropus (Cape Ant-eater, or Aard-vark). 

 Africa. 



