302 THE MARINE BOTANIST. 



than C. gracilis, with longer joints and more 

 attenuated ramuli." 



C, refracta. Grows in rocky pools left by the 

 tide. Torbay. Falmouth. Mount's Bay. Ilfracombe. 

 Jersey. Giant's Causeway, Howth. Balbriggan. 

 Mangan's Bay, co. Cork. Dunlecky Castle, Kil- 

 kee. Filaments capillary, three to five inches long, 

 very much branched, bright green. '^ This beautiful 

 plant is nearly allied to C. albida, but the filaments 

 are coarser, and far more rigid, standing out from 

 each other when the tuft is removed from the 

 water ; the colour is a brighter and fuller green ; 

 the ultimate branches are shorter and more patent, 

 often strongly reflexed, and the general habit is by 

 no means spongy. It appears to prefer the clearest 

 and purest water, growing on the bare rock or 

 among corallines in deep cold pools left by the 

 tide, near the extreme of low water-mark.'' 



C. Balliana. Phyc. J3rif., PL 356. Sea shores, 

 at Clontarf. Filaments finer than the human hair, 

 from six to eight or ten inches long, tufted and 

 much branched, the branching repeatedly alternate. 



