178 COLLINS AND HERVEY. 



PLATE IV. 



Ceramothairmion Codii H. M. Richards. 



riGtrBB23. Union of three rhizoids from different nodes. 310X1. 



Dasya spinuligera Collins & Hervey. 



PiGTTBE 24. Branch with ramelli and young and matiure stichidia. 120 X 1. 

 FiGUBE 25. Cross section of branch. 160 X 1. 



Gymnothanmion bipinnatum Collins & Hervey. 



FiGUHE 26. Prostrate filament with two erect and two descending axes. 

 300 X 1. 



Ceramium cruciatum Collins & Hervey. 



Figure 27. Prostrate filament with rhizoids and base of erect filament. 



65 X 1. 

 FiGUEE 28. Branch with tetraspores. 120X1. 



