502 
CCELENTERA TES. 
illustration, has, immediately round the mouth, several circles of delicate grasping 
tentacles, shaped like curly cabbage or endive leaves. Below these comes a circle 
of numerous thick arms altogether unlike the others, being rough-skinned, and of 
a simple spindle shape, the body itself forming a thick disc. All the tentacles of 
endive-anemone, Crambadis (somewhat less than nat. size). 
the sea-anemones are hollow, with a fine aperture at the tip, through which, when 
the animal contracts, the water contained in the body-cavity can be expelled, but 
in the deep-sea forms these organs are very curiously modified. For instance, in 
the genus Polysiphonicb, here illustrated, the tentacles are short and unsuited for 
catching and holding prey ; 
but the aperture at the tip 
is large, and through it 
flows in water containing: 
organic detritus which can 
be used as food. The allied 
Sicyonis has sixty - four 
wart-like tentacles with 
wide apertures standing in 
a double circle round the 
mouth, and in Liponema 
the body-wall is perforated 
by several hundred aper¬ 
tures leading into the 
digestive cavity and corre¬ 
sponding to the tentacles. 
Although most mem¬ 
bers of the group arise as 
