Io8 PRIMEVAL MAN. 



have every possible variety of tint from the 

 fairest to the blackest races, so that the one 

 extreme passes into the other by small and 

 insensible gradations. As regards structure, 

 the differences between different varieties 

 of Man are comparatively trifling, and it 

 may safely be affirmed that all the efforts 

 of anatomists and physiologists who have 

 been most determined to magnify every 

 point of variation, have utterly failed to 

 render it impossible or improbable that all 

 men have had a common ancestor. But in 

 exact proportion as we hold to this conclu- 

 sion as the only satisfactory explanation of 

 the Unity of Man, must we be prepared 

 to accept the high probability, if not the cer- 

 tainty, of the very great antiquity of the Race. 



