MARINE ALGLE. 



83 



1 . Bangia fusco-purpurea. 



2. „ ciliaris. 



3. ,, ceramicola. 



4. „ carnea. 



5. „ elegans. 



Order XVII. OSCILLATOEIACEJE, 



Green or blue ; composed of continuous, tubular, 

 simple, or rarely branching filaments. 



XCIX. RlVULARIA. 



Filaments radiating from a point, immersed in gela- 

 tinous, globose fronds. 



1. Rivularia plicata. 

 •2. „ atra. 



3. ,, applanata. 



4. „ nitida, 



C. Schizosiphon. 

 Filaments sheathed, the sheath multifid. 

 1. Schizosiphon Warreniae. 



a 2 



