180 



COLLINS AND HERVEY. 



PLATE V. 



Figure 29. 

 Figure 30. 

 Figure 31. 



Figure 32. 

 Figure 33. 



Figure 34. 



Figure 35. 



Ceramiuin transversale Collins & Hervey. 



Prostrate filament with erect filament and rhizoids. 120 X 1. 

 Erect filament with branch. 255X1. 

 Branch with tetraspores. 160 X 1. 



Nitophyllum Wilkinsoniae Colhns & Hervey. 



Section of frond through a sorus. 160 X 1. 

 Superficial view of a sorus. 160 XI. 



Halymenia bermudensis CoUins & Howe. 



Cross section. 255 X 1. 



Halymenia pseudofloresia Collins & Howe. 



Cross section. 130 X 1. 



