G. NESEA. 113 



ments; and also that these Polypidoms arc wholly 

 enveloped in a mucilaginous substance, which is of a 

 green colour. 



These Polypidoms are of a membrano-calcareous 

 substance, of a bright green in a living state, becom- 

 ing white by desiccation, and rarely exceed a deci- 

 metre in height ; they are found in the Antilles, and 

 on the shores of the islands at the entrance of the 

 Gulf of Mexico ; they adhere to rocks and solid sands 

 by numerous and rather long fibres. 



PHCENIX. 



1. !Nesea phoenix. Stem rising from a fibrous root, 

 simple till it reaches the brushy head, whose branches 

 are composed of several rows of articulations united 

 and convergent, forming an oblong tuft. 



Coasts of the islands of Bahama. 



ANNULAR. 



2. Nesea anmdata. Stem simple and in rings, or 

 strongly marked with transverse wrinkles. 



The Antilles. 



WOOLLY. 



3. Nesea eriophora. Stem cylindrical or slightly 

 compressed, short, smooth on the surface ; branches 

 as fine as the hair of wool; the full size about four 

 centimetres. 



The Antilles. 



PENCIL-SHAPED. 



4. Nesea penidUus. Stem cylindrical, and nearly 

 Cor. p 



