xiv ILLUSTRATIONS 



Plate XXXVII 



W. O. Focke 205 



Plate XXXVIII 



Hermann Hoffmann 2,17 



Plate XXXIX 



' Charles Darwin 2,22 



Plate XL 



Sir Francis Gallon 242 



Plate XLI 



Digitalis lutea X purpurea; flowernig organs and tis- 

 sues of parents and F^ hybrid, by J. S. Henslow 261 



Plate XLII 



Gregor Mendel 287 



Plate XLI 1 1 



The Augustinian Cloister at Brilnn 288 



Plate XLIV 



Hugo De Vries 3^2 



Plate XLV 



C. Correns 33^ 



Plate XLVI 



E. von Tschermak 344 



Plate XLVI I 



William Bateson 3^0 



Plate XLVI 1 1 



Facsimile of letter of Mendel to Ndgeli, with 



signature 3^2 



