7S 



Marsupialia — dentition. 



Table-case, 

 No. 14a. 



arboreal in their habits. Eight existing species are represented 

 in the collection, chiefly by detached jaws from the bone-breccias 

 of the caverns of Miaas Greraes, Brazil, etc. Professor Cope has 

 described a species, Didelphys f tig ax, from the Miocene of Colo- 

 rado, nnder the name of Peratherium. Several extinct species 



Fig. 96. — Lower Jaw and Teeth of Amphilestes Broderipi (Owen), 

 (twice natural size), Great Oolite, Stonesfiekl, Oxfordshire. 



(Natural Size.) 



-Lower Jaw and Teeth of rhaxcolotherinm Bucklandi (Broderip, sp.) 

 from the Gre&t Oolite, Stonesfield, Oxfordshire. 



Fig. 9S. — Lower Jaw and Teeth of Triconodon rnordax (Owen), natural size. 

 Middle Purbeck Beds, Dorset. 



are represented from the Lower Miocene, the Oligocene, and the 

 Upper Eocene of France, and one from the Upper Eocene of 

 Hordwell, Hampshire. The genus Chironectes is also represented 

 from Minas Geraes, Brazil, by remains of the living species. 

 To the Polyprotodont type of Marsupialia may also be referred 



