THE MAMMALIA 



Arttodactyls 



R-rajsodactyls 

 icothsres 

 Fisstf>ed Carnivores/ 



25 



Toxodonts, 



Tyf>otkeres etc. 



Hyracoids Proboscxdea 



AmUypods 



I Galeopitki 

 \Bats 



\ Insect nrores 



Rodent; 



Polyprotodemt 

 Marsupials 



TDtfa'atodovit Marsupials 



Monotrevwes — 



Prototherva 



Permian Cywodovits 



Fig. 11. 



(Part of Gregory's Classification (1910) 1 .) 



Class Mammalia. 



Sub-class Prototheria. 



Order Monotremata. 

 Sub-class Theria. 



Infra-class Metatheria. 

 Order Marsupialia. 



Suborder Diprotodt »ntia. 

 Suborder Polyprotodontia. 

 Infra-class Eutheria. 



The members of the Infra-class Eutheria include the following subdivisions. 

 The appended scheme (Fig. 11), as already noted, shews a tentative arrange- 

 ment of their natural relations in the form of a genealogical tree. The 

 interrupted line surrounds the animals most nearly allied to Man. 



1 Adapted from the classification given in The Orders of Mammals by 

 W. K. Gregory. Bulletins of the American Museum of Natural History, 

 vol. xxvii. 1910. 



