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, dichotomous 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 salicornia. Stem articulated and 
dichotomous ; articulations nearly cylindrical, inter- 
spersed with plain rhomboidal cells. 
Seas of Europe and Asia. 
SALICORNOIDOUS. 
3. Cellaria salicornoides. Very small and branch- 
ing. 
Mediterranean. 
N. B. This species is very distinct from the last, 
but easily confounded with it. 
CEREOUS OR WAXEN. 
4. Cellaria cereoides. Stem branching; articu- 
lations nearly cylindrical, interspersed with cells ter- 
minated by projecting orifices. 
Mediterranean and Indian seas. 
