less compound ramification, a softer substance, a paler colour, 
and altogether a different aspect. I confess, however, that it is 
difficult at all times to affix clear limits between these species. 
Neither are uncommon on rocky shores between tide-marks. 
Fig. 1. ChaporHora ALBIDA :—the natural size. 2. Small part of a branch :— 
magnified. 3. Ramuli:—more highly magnified. 
