THE MARINE BOTANIST. 261 



involucral ramuli. Grows on rocks Sec., between 

 tide-marks, not uncommon near low water-mark. 

 Perennial. 



0. S. G. simplicifilum. On rocks near Black 

 Castle, and among rejectamenta at Ardinairy Point, 

 Co. Wicklow. ^^ Obtained plentifully at Freshwater 

 Bay, Isle of Wight, in August, 1841, by Messrs. R. 

 Ball and W. Thompson." — Eeport of British As- 

 soc, for 1846. Coast of Norfolk, Rev. W. S. Hore. 

 Very rare. Differs from G. equisetifolia in its more 

 attenuated branches and much brighter, pinky-red 

 colour. The ramuli are only once-forked in this, 

 while in G. equisetifolia they are many times dicho- 

 tomous. 



G, barbata. Thrown up by the sea, extremely 

 rare. Brighton Beach. Growing on algae in 

 rock-pools at Jersey, Miss Turner. A beautiful and 

 slender species, furnished at the upper joints with 

 whorls of very slender ramuli, " resembling the 

 byssoid fibres of a Polysiphonia ;" on these the te- 

 traspores are borne. 



G. Devoniensis, Muddy sea shores in deep 



