CORALLINACEiE. 127 



This plant is found in large quantities on all parts of 

 our coast. When growing in deep water or in the shade 

 it is of a dull dark purple colour ; but when exposed it 

 passes quickly through the various shades of lilac and 

 yellow to milk-white, which is the common colour of 

 cast-up specimens. It is perennial, and may be found 

 at all seasons ; but attains its greatest beauty in early 

 spring. 



Corallina squamata. The scaled Coralline. 



Fronds many times pinnate, growing on rocks in dense 

 tufts of considerable extent; articulations, of the lower 

 part of the stem bead-like, short, with blunt angles, be- 

 coming gradually longer, broader, and natter towards the 

 top, those in the summit of the stem and lesser branches 

 being broadly triangular, flattened, and having very marked 

 acute upper angles. Fructification in conceptacles formed 

 either from a terminal articulation, or on the surface of the 

 frond. 



This species is less common than C. officinalis, which 

 it much resembles. Externally it is usually taller and 

 more lax than that species, and the articulations of the 

 upper branches are more distinctly triangular. When 

 soaked in acid and examined under a microscope the 

 stripes on the articulations will be found to be more 

 curved and wider apart. It is perennial, and grows on 

 rocks near extreme low- water mark. It is in perfection 

 during summer. 



Genus XLVIII. JANIA. 



Frond thread-like, jointed, calcareous, forkedly divided ; 

 nodes very short. Spore-threads pyriform or club-shaped, 



