PALAEONTOLOGY SINCE CUVIEK. 57 



alternated with splendid forests. For an abundance 

 of animal life demands a corresponding fulness of 

 vegetation. 



' Those landscapes were enlivened by the most 

 varied forms of mammals, by the two-horned 

 rhinoceros and the gigantic boar ; also by monkeys 

 leaping from rock to rock; carnivora from the 

 families of the civet-cats, martens and cats all on 

 the hunt for prey ; the caves of the Pentelicon hills 

 were inhabited by hyaenas. In the same way as 

 quaggas and zebras now inhabit Africa in enormous 

 numbers, immense herds of Hipparion must have 

 there careered across the plains. Not less fleet in 

 their movements, and of an even lighter build, were 

 the antelopes, also in great numbers. Every troup 

 of a distinct species would be distinguished by the 

 form of their horns : those of the Palseoreas had a 

 spiral twist like those of the eland of the Cape ; the 

 horns of the Ant id ore as were curved in the form of 

 a lyre ; in the PalaBoryx they were long and bent. 

 The horns of the antelopes resembled those of the 

 gazelles, those of the Tragoceras were placed like 

 those of goats. Palaeotragus was distinguished by 

 a slighter build and a narrower skull, with horns 

 situated immediately above the eyes. But Hella- 

 dotherium and another species somewhat akin tq 



