64 



DARWINISM 



CHA.P. 



VARIATION 



OF 40 MALES OF 



AGEL/EUS PflCENlQEUS. 



LengtHiof Bill. 



Total Length of Bird. 



• •• 



• •• 



•• •• 



••. 



•••• •••••••••••••• • 



Length 



of TaiL 



• ••• 

 •• ••• •••••• 



Lengtn of Wing. 



4 

 Fig. 10. 



of variation of each part would increase also, at first rather 

 rapidly and then more slowly ; while gaps and irregularities 



Curves of Variation 

 Fig. 11. 



would be gradually filled up, and at length the distribution 

 of the dots would indicate a tolerably regular curve of double 



curvature like those shown in Fig. 11. 



The great divergence 



