CLASSIFICATION OF VERTEBRATA 41 



Diprotodontidae. Diprotodon, Nototherium. Plistocene, 

 Australia. 



Macropodidae. Macropus, Hypsiprymnus. Australia. 



Macropristis. Plistocene, Patagonia. 



Thylacoleontidae. Thylacoleo. Plistocene, Australia. 



Phascolomyidae. Phascolomys. Since the Plistocene in 

 Australia. 



3. Sub-CLASS EUTHERIA, Huxley, s. MONODELPHIA 

 de Blainville, s. PLACENTALIA, Owen 



Viviparous, with chorion and placenta. Without marsu- 

 pium, and without marsupial bones. 



Coracoids reduced to the " coracoid process " of the 

 scapula. 



Males at least without cloaca ; perineum separating the 

 anal and urogenital orifices. 



1. Order Edentata (Vicq. d'Azyr), Cuvier. Terrestrial. 

 Dentition reduced to molars without enamel, or lost com- 

 pletely. 



Probably a heterogeneous assembly. 



1. Sub-order NOMAETHRA, GiU. With normal verte- 

 bral zygapophyses. Restricted to the Old World. 



Orycteropodidae. Orycteropus, now Ethiopian; upper 

 Miocene of Samos. 



Manidae. Manis. Palaeotropical ; in India since the 

 Oligocene. 



2. Sub-order XENARTHRA, Gill. Zygapophyses with 

 additional articular facets. American, since the Oligocene. 



Bradypodidae. Bradypus, Choloepus. Central and South 

 America. 



Megatheriidae. Extinct, Tertiary. 

 Moropus. Miocene, North America. 

 Morotherium. Lower Pliocene, North America. 

 Mylodon, Scelidotherium. Plistocene of South America. 

 Megatherium. Plistocene, America, etc. 

 Myrmecopliagidae. Myrmecophaga, Cycloturus. Neo- 

 tropical. 



