90 
CLASS I. — ORDER II. 
flexible, and sometimes thinly incrusted at the lower 
part with a calcareous substance ; and this part is al- 
most always found devoid of polypiferous cells. 
The form of these Polypidoms varies more than 
those of other genera ; but the same generic character 
is observable, that of having their cells supported on 
a short pillar. 
Their substance is horny, membranous, sometimes 
slightly cretaceous. 
The colour varies according to the species ; there 
are some of a deep brown fawn, and others of a bright 
clear yellow fawn. 
Their height is also various, exhibiting every inter- 
mediate gradation from two centimetres to two or 
three decimetres. 
These Polypidoms are found in all seas, sometimes 
parasites on the Thaiassiophytes, and at others ad- 
hering to rocks by more or less numerous fibres of 
greater or less extent. 
ANTIPATHES. 
1. Laomedea antipathes. Stem rugged, branch- 
ing, and bushy ; branches pinnated ; cells campa- 
nulated, and dispersed on the branches and shoots ; 
pedicle rising from a flat base ; colour red-brown, 
sometimes greyish ; height a decimetre. — Plate 6. 
fig. 1. a. B. 
Australasia. 
LESAUVAGEU 
2. Laomedea Sauvagii. Stem but slightly branch- 
ing, and fistular; from a millimetre to a millimetre 
and half in diameter; cells campanulated, and very 
