

ILLUSTRATIONS IN THE TEXT. 



FIGS. PAGE 



1. Successive development of root-node of Chara 



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. Groves) ...... 30 



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



9. Transverse sections of stems showing various types 



of cortex of Chara ...... 34 



10. Cortex of Chara aculeolata (after Hill) . . .35 

 11. Root-bulbils of Chara aspera (after Giesenhagen) . 38 

 12. Bulbils of Chara fragifera (after Giesenhagen) . 39 



13. Bulbils of Chara baltica (after Giesenhagen) . . 39 



xiii 



