80 



LIST OF THE BKTTISH 



21. Cladophora flavescens. 



22. „ fracta. 



XCII. Khizoclonium. 



Filaments jointed, decumbent. Branches short and 

 root-like. Fruit, granules contained in the cells. 



1. Ehizoclonium riparia. 



XCIIL Conferva. 



Filaments unbranched, composed of a single series of 

 cells or articulations. Fruit aggregated granules or 

 zoospores contained in the articulations, having at some 

 period a proper ciliary motion. 



1. Conferva arenicola. 



2. 



, arenosa. 



3. 



, littorea. 



4. 



, Linum. 



5. 



„ sutoria. 



6. 



, tortuosa. 



7. 



, implexa. 



8. 



, melagonium. 



9. 



serea. 



10. 



, collabens. 



n. 



„ bangioides. 



