-w-V'^t ;^ "i'^-aV'. 'C-A*- <-.- 



- -^^"-^BCWZS^- 





.'-^-^Nj; 



>^ '4^.«^^^7^,' 







HYRACOTHERIUM 

 The most primitive horse-like form known. Remains found in the London Clay 



[To face page 121 



