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1
164
Glaucus; Or, The Wonders of the Shore
·
Charles Kingsley
161
PLATE
VIII.
MOLLUSCA.
NASSA
RETICULATA.
Pl.
VIII.
fig.
2,
a,
b,
c,
d,
e,
f
A
VERY
active
Mollusc,
given
here
chiefly
on
account
of
the
opportunity
afforded
by
the
birth
of
young
fry
in
Mr.
Lloyd’s
tanks.
The
Nassa
feeds
on
small
animalcules,
for
which,
in
aquaria,
it
may
be
seen
routing
among
the
sand
and
stones,
sometimes
burying
itself
among
them
so
as
only
to
show
its
caudal
tube
moving
along
between
them.
A
pair
of
Nassæ
in
Mr.
Lloyd’s
collection,
deposited,
on
the
5th
of
April,
about
fifty
capsules
or
bags
of
eggs
upon
the
stems
of
weeds
(fig.
2
b);
each
capsule
contained
about
a
hundred
eggs.
The
capsules
opened
on
the
16th
of
May,
permitting
the
escape
of
rotiferous
fry
(fig.
2,
c,
d,
e),
not
in
the
slightest
degree
resembling
the
parent,
but
presenting
minute
nautilus-shaped
transparent
shells.
These
shells
rather
hang
on
than
cover
the
bodies,
which
have
a
pair
of
lobes,
around
which
vibrate
minute
cilia
in
such
a
manner
as
to
give
them
an
appearance
of
rotatory
motion.
Under
a
lens
they
may
be
seen
moving
about
very
actively
in
various
positions,
but
always
with
the
look
of
being
moved
by
rapidly
turning
wheels.
We
should
have
been
glad
to
witness
the
next
step
towards
assuming
their
ultimate
form,
but
were
disappointed,
as
the
embryos
died.
Fig.
2
f
is
the
tongue
of
a
Nassa,
from
a
photograph
by
Dr.
Kingsley.
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