ITS NEAREST EXISTING INFLATIONS 



G3 



America, where Tlippotherium takes its place. Proto- 

 Tiippus and various other names have been proposed for 

 other modifications (differing chiefly in tooth structure) 

 of animals in the same general phase of evolution. The 

 great variety of these forms may be gathered from the 

 fact that in a recent memoir Professor Cope has described 

 fifteen species of Hippotherium, which he considers to be 

 quite distinct from each other, from North America 

 alone. 1 



The term c Hipparion ' has become so well known, 

 even beyond the limits of strictly scientific literature, 

 that it may be conveniently used as a common name for 

 all the three-toed horse-like animals which immediately 

 preceded the existing Equidce, reserving Hippotherium, 

 Protohippus, &c, for generic modifications capable of 

 exact zoological definition. 



In the quarries of Pikermi, in Greece, an immense 

 number of remains of large animals, now entirely ex- 

 tinct, have been discovered and made known to us 

 mainly by the admirable memoir published upon them 

 by the eminent French palaeontologist, Albert Gaudry. 2 

 These animals include monkeys, civets, hyaenas, wild 

 boars, rhinoceroses, antelopes of various kinds, a great 

 giraffe-like creature called Helladotherium, and hippa- 



1 ' A Review of the North American Species of Hippotherium,' 

 Proc. American PMlosophical Society, 1889. 



2 Animaux fossiles et Geologic dc VAttique % 18G2. 



