ILLUSTRATIONS IN THE TEXT. 



FIGS. PAGE 



1. — Successive development of root-node of Ghara 



aspera (after Giesenhagen) . . . 18 



2. — Transverse sections of root-node of pro-embryo of 



Chara canescens (after De Bary and Kamienski) 20 



3. — Young shoot of Nitella in successive stages (after 



Giesenhagen) ....... 23 



4. — Transverse sections of young stem-node of Chara 



delicatula (after Kuczewski) . . .23 



5. — Axial section of shoot of Chara (after Sachs) . . 24 



6. — Portions of young branchlets (after Sachs, Prosper 



and Kuczewski) ....... 27 



7. — Stem-nodes showing various forms of stipulodes 



(after H. G-roves) . . . .30 



8. — Various types of stem-cortex of Chara . 32 



9. — Transverse sections of stems showing various types 

 of cortex of Ghara ... 



10. — Cortex of Chara andeolata (after Hill) . 



11. — Eoot-bulbils of Chara aspera (after Giesenhagen) 



12. — Bulbils of Chara fragifera (after Giesenhagen) 



13. — Bulbils of Chara baltica (after Giesenhagen) . 



xiii 



34 

 35 

 38 

 39 

 39 



