THE MARINE BOTANIST. 97 



SERIES II. 



RHODOSPERME^. 



THE RED SERIES. 



Seaweeds of a rose-red, purple, or red-brown 

 colour, leafy, cylindrical, or filamentous. Fructifi- 

 cation of two kinds, formed on distinct plants. 

 1. Spores y contained either in external or immersed 

 conceptacles, or densely agg-regated together, and 

 dispersed in masses through the substance of the 

 frond. 2. Spores (called tetraspores), either 

 external or immersed in the frond, rarely contained 

 in proper conceptacles, each spore^ when mature^ 

 separating into four sportdes. Antheridia (not 

 observed in all)^ filled with small yellow bodies. 



H 



