THE MARINE BOTANIST. 303 



but irregular and difficult to trace^ with a more or 

 less evident leading* stem. The length of the cells 

 in the principal division is from eight to ten times 

 their diameter, or perhaps more ; in the ramuli the 

 cells are shorter. '^ C. Balliana is readily known 

 from all its British congeners but one, by the 

 tenuity and lubricity of the filament, in conjunction 

 with the great length of the cells. The only one 

 with which it can be confounded is C. Rudolphiana, 

 but the ramification is so different in that plant, that 

 notwithstanding its near agreement in the length of 

 the articulations and the general aspect of the tufts, 

 there can be httle difficulty in distinguishing one 

 from the other." — Harv, 



C. albida. Grows on rocks and the larger algae, 

 below half-tide level. Frequent. Filaments very 

 slender, flaccid, two to six inches long, pale green, 

 fading greatly in drying, and without gloss. The 

 soft and slender filaments, and uniformly short 

 joints, distinguish it from the common species. 



C, lanosa. Grows on rocks, or more fi'equently 

 on the larger Fuci. '' Filaments forming small. 



