THE MARINE BOTANIST. 173 



frond of a greater or less degree of thickness. In 

 the East several species of this genus are made into 

 jelly, and Mrs. Griffiths once prepared from G. com- 

 pressa a pickle and preserve which proved, we are 

 told, " excellent in flavour as well as ornamental ; " 

 it is, unfortunately, one of our rarest species ; and 

 M. Soyer will never be able to employ his culinary 

 skill in its favour, as he has done with the well- 

 known Dulse R. palmata of this tribe. 



GENERA OF THE RHODYMENIA TRIBE. 



Stenogramme. " Conceptacles linear, rib-like. " 



Tetraspores collected into dense, oval, well-dejined 



son. 

 Rhodymenia, Tubercles convex, scattered. Frond 



flat. 

 SpJicerococcus, Frond linear, compressed, distich- 



ously branched. 

 Gracilaria, ^^ Frond filiform, compressed or flat, 



irregularly branched ; the central cells very 



large. " 



