206
’
THE SEAS
‘
by a sudden twisting movement, they drive the edge of their
own shell in between the open valves, which are thus held
apart sufciently to allow the proboscis to be pushed in
(Plate 7 5).
Others again grip the shell of their prey with
their broad feet and force'the edges together, cracking o
-
pieces near the edgeuntil a hole is made large enough to
,
allow the proboscis to enter.
The sea slugs frequently
?
'
browse on stationary animals ; thus the sea lemon, Doris,
—
spends its life scraping sponge into its mouth with its broad
-
radula; the beautifully coloured Æolis feeds on anemones,
'
being
quite unharmed by the nettle cells.
It is
_
a very remarkable fact that these nettle cells, after they have
'
.
been swallowed, are transported into the little projections on
the back of the Æolis, where they establish themselves and
in which they are always found, so that the older naturalists
thought they actually developed there.
Their value to
»
the Æolis, if any, is not very clear, though they may help
.
.
to
protect _it.
One little sea Slug called Calma feeds
exclusively on the eggs
and embryos of shore shes, which
are laid on stones and shells.
When feeding, its face ts
like a hood over
egg, Which is slit open by the narrow,
saw-like radula and “the“ contents swalloWed.
There
is
another type of
marine snail, the boat—shell,
Scaphander, which swallows small bivalves whole and then
crushes them to pieces in a‘special giàzard lined with limy
or horny plates ahdworked by poweffùlxmuécles.
"
Ÿ
-The active .»pelagi0 squids pursùe-shoals of shmear the
_
The
and-cuttlesh lie concealed, the “one
in creviceSamong rocks and the other in
and ’dart
.
_
-out upon their prey, usually sh or Crabs, which they seize
_
__
-
by means of their _tentacles armed with_suckers. They are '
—
particularly careful when attacldng,crabs toSeize them from
'
behind _so_
that these are unable to' defen‘d themselves by -
'
,
means of their claws, which are gripped rmlyby…the
’
THE SEAS
‘
by a sudden twisting movement, they drive the edge of their
own shell in between the open valves, which are thus held
apart sufciently to allow the proboscis to be pushed in
(Plate 7 5).
Others again grip the shell of their prey with
their broad feet and force'the edges together, cracking o
-
pieces near the edgeuntil a hole is made large enough to
,
allow the proboscis to enter.
The sea slugs frequently
?
'
browse on stationary animals ; thus the sea lemon, Doris,
—
spends its life scraping sponge into its mouth with its broad
-
radula; the beautifully coloured Æolis feeds on anemones,
'
being
quite unharmed by the nettle cells.
It is
_
a very remarkable fact that these nettle cells, after they have
'
.
been swallowed, are transported into the little projections on
the back of the Æolis, where they establish themselves and
in which they are always found, so that the older naturalists
thought they actually developed there.
Their value to
»
the Æolis, if any, is not very clear, though they may help
.
.
to
protect _it.
One little sea Slug called Calma feeds
exclusively on the eggs
and embryos of shore shes, which
are laid on stones and shells.
When feeding, its face ts
like a hood over
egg, Which is slit open by the narrow,
saw-like radula and “the“ contents swalloWed.
There
is
another type of
marine snail, the boat—shell,
Scaphander, which swallows small bivalves whole and then
crushes them to pieces in a‘special giàzard lined with limy
or horny plates ahdworked by poweffùlxmuécles.
"
Ÿ
-The active .»pelagi0 squids pursùe-shoals of shmear the
_
The
and-cuttlesh lie concealed, the “one
in creviceSamong rocks and the other in
and ’dart
.
_
-out upon their prey, usually sh or Crabs, which they seize
_
__
-
by means of their _tentacles armed with_suckers. They are '
—
particularly careful when attacldng,crabs toSeize them from
'
behind _so_
that these are unable to' defen‘d themselves by -
'
,
means of their claws, which are gripped rmlyby…the