NATURAL HISTORY. 
CALLITHAMNION. 
The filaments jointed and branched—the articula- 
tions marked with a single broad tube-like line, the 
joints pellucid. The Fructification, pedunculauted 
capsules on the branchlets, 
1. C. Terricum. Dillw. t. 81. (Cownr, 
TETRICA.) 
GRIFFITHSIA. 
In this genus the seeds are immersed in a gelatine, 
and surrounded by an involucre, and the filaments 
jointed and branched, 
1. G. Seracea. Dillw. t. 82. (Conr. Sera- 
cEA.) A frequent plant. 
2, G. Egursetiroiia. Dillw.t.54, (Conr, 
EeutiseTiFoxura.) Back of Exmouth warren. 
2. Olive green, or brown, 
CLADOSTEPHUS. 
The primary filaments are solid, with whorled 
branchlets, of a different structure, at the joints,— 
the fructification capsular, 
1, C. Verticitziatus. Dillw. t.55. E, Bot. 
t.1718. In rocky basins on the coast, 
