G. CELLARIA. • 55 



times a bright red, and sometimes a more or less 

 brilliant yellow ; in the collections some are white, 

 and some yellowish. 



They never exceed a decimetre in height. 



They appear always fixed to rocks or other hard 

 marine bodies ; I[have never observed any on the leaves 

 or branches of the Thalassiophytes. 



HAIRY. 



1. Cellaria hirsuta. Articulated, dichotoraous or 

 branching; articulations cylindrical, very small at 

 their extremities, covered with dispersed cells and 

 numerous long articulated hairs ; straw colour ; a 

 decimetre high. — Plate 2. fig. 4. a. B. 



SALICORNINE. 



2. Cellaria salicomia. Stem articulated and 

 dichotomous; articulations nearly cylindrical, inter- 

 spersed with plain rhomboidal cells. 



Seas of Europe and Asia. 



salicornoidous. 



3. Cellaria salicorndides. Very small and branch- 

 ing. 



Mediterranean. 



N. B. This species is very distinct from the last, 

 but easily confoimded with it. 



CEREOUS OR WAXEN. 



4. Cellaria cereo'ides. Stem branching; articu- 

 lations nearly cylindrical, interspersed with cells ter- 

 minated by projecting orifices. 



Mediterranean and Indian seas. 



