THE POLYVPIERS. 87 
singular and interesting kind. Sometimes it perfectly resembles 
an old ruined tree stripped of its leaves; sometimes it is like 
a little shrub in full bloom, rising from the summit of a brown 
A SERTULARIA. 
(Sertularia [Plumularia] falcata.) 
spotted stem, with many branches and tufted shoots terminating 
in so many hydras of a beautiful yellow or brilliant red. 
The Campanularia differ considerably from the above, the ends 
of the branches whence the polypes issue being enlarged, into a 
