178 



COLLINS AND HERVEY. 



PLATE IV. 



Ceramothamnion Codii H. M. Richards. 

 Figube23. Union of three rhizoids from different nodes. 310X1. 



Dasya spinuHgera CoUins & Hervey. 



Figure 24. Branch with ramelH and young and mature stichidia. 120 X 1. 

 Figure 25. Cross section of branch. 160X1. 



Gymnothamnion bipinnatum Collins & Hervey. 



Figure 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. 

 Figure 28. Branch with tetraspores. 120X1. 



