CONTENTS XIX 



Chapter Page 



XXX. Seed-bearing -Plants (concluded) . 489 



Monocotyledons .... 489 



Types of Monocotyledons 491 



XXXI. Evolution 502 



XXXII. Darwinism . . . . 510 



XXXIII. Experimental Evolution. 520 



XXXIV. ■ Heredity 541 



XXXV. Experimental Study of Heredity 549 



XXXVI. The Evolution of Plants. . . 569 



XXXVII. Paleobotany 578 



XXXVIII. The Evolution of Plants (concluded) 592 



Appendix . . ... 621 



