THE MARINE BOTANIST. 169 



when placed in fresh water. I have remarked that 

 when the water first comes in contact with the 

 frond it immediately loses its crispness, hissing 

 and crackhng" like slackened lime, giving out at 

 the time a peculiar strong and pungent odour, 

 which makes the eyes smart. 



Not noticed on any other shores than those of 

 England and Ireland, neither has it ever been 

 procured in a growing state : its place of growth 

 is probably in deep water. June to August. 

 Hfracombe. Minehead, Somerset; I. G. Not un- 

 common during the above months, and frequently 

 cast ashore in a fresh state. Youghal. 



PLOCAMIUM. 



Name meaning intertwined hair, in allusion to the finely 

 branched fronds. 



Frond pinky-red, linear, compressed or flat, rib- 

 less, or faintly-nerved, cellular, distichously much 

 branched; the ramuli alternate or secimd, acute. 

 Pructification : 1. Spherical tubercles (coccidia), 



