THEORIES OF LAMARCK AND DARWIN 



379 



he succeeded. The fruit of his labors, the Natural His- 

 tory of Invertebrated Animals (Historic naturelle des Ani- 



FIG. 112. LAMARCK, 1744-1829. 

 From Thornton's British Plants, 1805. 



maux sans Verlebres, 1815-1822), became a work of great 

 importance. He took hold of this work, it should be re- 

 membered, as an expert observer, trained to rigid analysis 



