3IO LLOYDS NATURAL HISTORY. 



tinct Deer^ among which Savin's Deer {Cervus savini) is re- 

 markable for the flattened form of the "brow"-tine, while in the 

 magnificent species (C sedgwicki) named after the well-known 

 Professor of Geology at Cambridge the spreading antlers 

 attained a complexity of structure unknown in any other 

 member of the genus. Of other Ungulates, the Hippopotamus, 

 the Wild Boar, and the Horse, date from the Forest-bed ; and 

 the occurrence in this formation of the former species in 

 association with the Musk-Ox, Glutton, and Walrus, presents 

 us with another of the puzzles which almost break the heart of 

 the palaeontologist. In addition to the Common Horse, there 

 was an extinct species known as Steno's Horse {Equus stenonis\ 

 and distinguished by the small size of the so-called front inner 

 pillar of the upper molar teeth, or the portion occupying the 



Fig. I. Right upper molar tooth of Steno's Horse." 



middle of the lower border of the annexed figure. In this 

 respect the species in question was less specialised than the 

 modern Horse, and makes a step in the direction of the under- 

 mentioned Hipparion. On the Continent Steno's Horse occurs 

 in beds of upper Pliocene age, where it was accompanied by 

 the Etruscan Rhinoceros {Rhinoceros etuscus\ as was also 

 the case in the Forest-bed. This Etruscan Rhinoceros 

 differs from the Leptorhine and Megarhine Cavern species 

 in the much lower crowns of its molar teeth, and is like- 

 wise, therefore, a more generalised type. So far as can be 



