THE HALF-TIDE POOL. 49 



plentiful between, tide marks on the south coast of 

 England, and in the Channel Islands, also on the 

 Ayrshire coast. 



CEEAMirii GrEACiLLi^irM. — This is only found in 

 the lowest tide-pools. See Chapter V., as also 

 Ceramium ttistigiatum. 

 Ceramium Striatum. 

 Ceramium Nodosum. 



MESOGLOIA. 



(Name from two Greek words, signifying "viscid" and "middle.") 



Generic character. — Thread-like frond, composed of 

 loosely-packed filaments, invested with gelatine. The 

 radiating filaments of the axis terminate in clusters 

 of clnb-shaped, bead-like fibres. 



'Fructification. — Obovate spores, seated among the 

 terminal fibres. 



jXesogloia Yieescexs. — The soft shiny fronds of 

 this plant will help to recognize it. It is of a light 

 pretty green, the stem mnch branched, and it adheres 

 well to paper, making an excellent specimen. If 

 examined with a microscope, the texture is truly 

 beautiful: the filaments are composed of little cells, 

 strung like beads in tufts, and joined to a main row 

 of cells; at the base of the tuft spores are visible, 

 dark olive dots with a pellucid border. 



D 



