THEORIES OF LAMARCK AND DARWIN 379 



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

 tory of Invertebrated Animals (Hislorie naturelle des Ani- 



Fig. 112. — Lamarck, 1744-1829. 

 From Thornton's British Plants, 1805. 



maux sans Vertebres, 181 5-1822), 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 



