56 



LIST OF THE BKITISH 



7. Polysiphonia Eichardsoni. 



8. 



>> 



Crri ffi th si an a 



9. 



55 



elonffella. 



10. 



55 



elongata. 



11. 



55 



GrAvillii 



12. 



35 



violaftfta 



13. 



55 



Carmichaeliana 



14. 



55 



fibrillosa. 



15. 



55 



Brodiffii. 



16. 



55 



va,rie£?ata. 



17. 



55 



obscura 



18. 



55 



simulans. 



19. 



55 



nisrrescens 



20. 



5 5 



affinis. 



21. 



55 



subulifera. 



22. 



5 5 



atro-rubescens. 



23. 



55 



furcellata. 



24. 



55 



fastigiata. 



25. 



55 



parasitica. 



26. 



55 



byssoides. 



XLI. Dasya. 



Frond filamentous. The stem and branches mostly 

 opaque. Articulations of the ramuli single-tubed. Te- 

 traspores in lanceolate, pod-like receptacles. 



