FOSSIL MAMMAL GALLERY. 
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the great extinct Irish Deer (Cervus giganteus), male and female, 
the former distinguished by its magnificent spreading antlers, 
resembling those of a Fallow Deer on a large scale. 
The next central case is occupied by the skulls and portions 
of jaws of a remarkable horned and hoofed quadruped, Arsindi- 
tliermm (fig. 42), from the Upper Eocene of the Fayum, Egypt. 
Fig. 42. — Skull of Arsinditherium xitteli, from the Upper Eocene strata of the 
Fayum, Egypt. The skull is three feet long.; 
It belongs to an ancient group perhaps related to the ancestors 
of the Elephants. 
Equally peculiar is the Toxodon (fig. 43) of the Pampas of S. 
America, of which a model of an entire skeleton is exhibited. 
Near by is placed a model of a skeleton of the Dinoceras 
(fig. 44), one of the most remarkable of the many wonderful 
forms of animal life discovered in the Tertiary beds of the 
