152 CLUES AND SUGGESTIONS CHAP. 



in the geological scale, are now found to 

 contain several of the divergent forms 

 which lead up to the fully developed 

 Horse. 1 It is as if the creative energy, 

 which on every theory must have begun 

 the series in the creation of the original 

 germs, had been then calling out their 

 included potentialities into manifestations 

 unusually rapid. These manifestations 

 were all pointing steadily in one direction, 

 namely, the establishment on a con- 

 tinent ceasing to be marshy of a species 

 of quadruped, organised for a singular 

 combination of strength, and fleetness, 

 and endurance in the machinery of loco- 

 motion upon drier land. 



This example of the correlations of 

 growth effected in all probability through 



1 I have taken these facts from a very remarkable 

 paper in the Proceedings of the American Philo- 

 sophical Society for August 1 896, " On the Osteology 

 of the White River Horses," by Marcus S. Farr, pp. 

 I47-I75- 



