STALKED DIATOMS. 



121 



The enclosed protoplasm soon adds a new film of 

 silica to the naked surface, and thus a new diatom is 

 born. Many of the diatoms, like the desmids, live 

 either part or the whole of their lives in colonies, as 



Fig. 81. 



Licomophora flabellata. 



for instance Licmophora (Fig. 81). This is a marine 

 species, and may be found in rock-pools, where it is 

 readily identified by its resembling a golden wool, 

 shining like spun glass when transferred to the col- 



