THE EQUID^E, OR HORSES. 



209 



comparisons of recent times have shown us these 

 changes down to the minutest detail ; and from the 

 geological series, which is being made more com- 

 plete year by year, the complex formation of the 

 horse's molars becomes perfectly intelligible from 

 the outlines on those of the Palaeothermm. Kiiti- 



FIG. 37. Right Upper- jaw Molar of the Horse. 



a, t, r, h. Outside, inside, front, back ; M, m, front, back crescent ; P, p, larger 

 and smaller inner pillar ; F,f, inner main- and side-fold. After Branco. 



meyer further gives special proofs that the species 

 in question transmitted the relative peculiarities of 

 their molars to the milk-teeth of their offspring 

 and descendants, whereas the descendants trans- 

 mitted the new inheritance specially to the molar 

 teeth. 



