THEORY OF THE EARTH. 285 



large in its linear dimensions as the American 

 Tapir *. Its teeth have been found in several 

 parts of France and Germany ; and almost always 

 accompanying those of rhinoceroses, mastodons, 

 or elephants. 



Along with these there is still associated, but as 

 it would seem in a very small number of places, a 

 large pachydermatous animal, of which the lower 

 jaw alone has been found, and whose teeth are of 

 the form of double crescents, and undulated. M. 

 Fischer, who discovered it among bones from Si- 

 beria, has named it Elasmotherium\ . 



The Horse genus also existed in those timesf . 

 Its teeth accompany in thousands the remains of 

 the animals which we have just mentioned, in al- 

 most all their localities ; but it is not possible to 

 say whether it was one of the species now exist- 

 ing or not, because the skeletons of these species 

 are so like each other, that they cannot be distin- 

 guished by the mere comparison of isolated frag- 

 ments. 



The Ruminantia were now greatly more nume- 

 rous than at the epoch of the Palaeotheria ; their 

 numerical proportion must even have differed 



* See my " Researches," vol. part i. p. 89. 

 t Id. p. 95. t Id - P- ] 9 



