THE SEA ‘SHORE
,
31
.
water mark by a broad belt composed'of several” kinds-Of
Laminaria, the largest of the brown Weeds which has long
_
fronds, very broad and without a mid‘—rib, and is secured to
the rocks by a massive “
hold—fast.” ‘They are never
exposed except at the lowest spring tideS.
,‘
'
'
_
A number‘of other weeds are comm0n on the shore, and
can
most conveniently be referred to 'now. ’The green
weeds
are
especially widespread, the "‘
(Ulva laotuca) with broad, delicatè fronds and living in
'
pools usually above half—tide level, and Cladoÿhora mpestris
_
of a -darker green and bushÿ compact growth which is
common in pools everywhere.
An easily recogniz_ed broWn
weed cdmmonly exposed between tide—marks is Himantkalæ'a
lama, which has peculiar cup—shaped attachments to the
'
long marrow fronds, While of the red weeds, the "‘Dulse ”
(Rhodymenia palmatà) which has at, irreguiar crimson
fronds,
and
“
Carragheen
”
(Chondrus crisÿus) (Plate
127) with thicker dark red—dish-bro‘wn
fronds,
which
appear blue when seen in certain lights, are the commonest,
'occurring in the upper and loWer regions of the shore
respectively.
The latter is eaten in certain parts of Ireland. '
Frequent in rock pools are the-pink encfusting- corallines
{Plate 8), not at rst easily recognized as sea
weeds for they
limy Skeletons' like some of the encrusting animals.
—;ÏÏË% Now let us consider some of the animals which live en
rocky shores.
They may be divided' roughly into four
categories, those which live exposed on the surface ‘of
stones, rocks, or weeds, those found under stones, those
which live in
_
hgl£æ_S and
in the rocks, and those
inhabiting rock pbols. ‘Of the'rst group the most chaf—
acteristic members are the sessile acorn—bafnacles (Balanus)
‘
wihiéh cover the rocks with a carpet of‘little sharply pointed
‘
pyramids, especially—near high—water mark
Where they form”
.
,a, denite Balanus zone (Plate IO).
Here too are many
,
31
.
water mark by a broad belt composed'of several” kinds-Of
Laminaria, the largest of the brown Weeds which has long
_
fronds, very broad and without a mid‘—rib, and is secured to
the rocks by a massive “
hold—fast.” ‘They are never
exposed except at the lowest spring tideS.
,‘
'
'
_
A number‘of other weeds are comm0n on the shore, and
can
most conveniently be referred to 'now. ’The green
weeds
are
especially widespread, the "‘
(Ulva laotuca) with broad, delicatè fronds and living in
'
pools usually above half—tide level, and Cladoÿhora mpestris
_
of a -darker green and bushÿ compact growth which is
common in pools everywhere.
An easily recogniz_ed broWn
weed cdmmonly exposed between tide—marks is Himantkalæ'a
lama, which has peculiar cup—shaped attachments to the
'
long marrow fronds, While of the red weeds, the "‘Dulse ”
(Rhodymenia palmatà) which has at, irreguiar crimson
fronds,
and
“
Carragheen
”
(Chondrus crisÿus) (Plate
127) with thicker dark red—dish-bro‘wn
fronds,
which
appear blue when seen in certain lights, are the commonest,
'occurring in the upper and loWer regions of the shore
respectively.
The latter is eaten in certain parts of Ireland. '
Frequent in rock pools are the-pink encfusting- corallines
{Plate 8), not at rst easily recognized as sea
weeds for they
limy Skeletons' like some of the encrusting animals.
—;ÏÏË% Now let us consider some of the animals which live en
rocky shores.
They may be divided' roughly into four
categories, those which live exposed on the surface ‘of
stones, rocks, or weeds, those found under stones, those
which live in
_
hgl£æ_S and
in the rocks, and those
inhabiting rock pbols. ‘Of the'rst group the most chaf—
acteristic members are the sessile acorn—bafnacles (Balanus)
‘
wihiéh cover the rocks with a carpet of‘little sharply pointed
‘
pyramids, especially—near high—water mark
Where they form”
.
,a, denite Balanus zone (Plate IO).
Here too are many