FEEDING OF MARINE ANIMALS
201
of branching tentacles ar0und their mouths, have an Original
manner of feeding (Fig. 43).
The tentacles are usually
proj ected out of the rock and, as they are covered with Slime,
food quickly collects upon them ; but there are no cilia
to carry the food to the mouth, instead the tentacles are
deliberately curved' inwards '
and pushed te their tullest
’
into the mouth and
_
_
then slowly withdrawn, the
food
being scraped off by
'
means
of
a
pair of short
_
—
Y‘èshaped tentacle sat the side
'
of the mouth.
One tentacle
'
‘
after another is pushed into
the mouth in regular sequence
,
and
suçked
Clean—exactly
.
'
«
like a child sucking jam— off
'
'
its ngers ! -One of the marine
snails called Vermetus, feeds
.
in a manner peculiar to itself;
.
It has largely lost the power
'
of movement
uses
the
'
—
mucus, which such creatures'
n‘ormally employ to lubricate
their movements, to catch its
food, throwing out a sheet of
.
»sticky‘ mucus in which 'ne
.
'
particles and animals jare
-
after a time Frs.
sea cucumber, Cuéumäria,
drawing this“ with “the col—
'
(X
lected food‘backiiutp its mouth;
-
.
_'
BURROWE_RS AN]? SCRAPERS
,
»_.
’
,
'
many animals (sûcha‘sworms, and Sea cucumbem)
_
'