36
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THE SEAS
“
"
(Plate 15); are also inhabitants of roCky shores.
They are
covered with spi'nes—which in allied animals from -warmer
._
seas may be of great length and, sometimes, thickness—
and'must be handled carefully.
,.
.
-.
,
Some shore shes can always be found under stones.
‘
The most common is probably the buttersh -(Centronotus
gunellus), about six inches long, eel-like, attened from side
to side and with nine or more dark spots edged with yellow
,
down the middle of the back.
The smooth blenny (Blennius
pholis) (Plate 8), can 'withstand long periods out of
water
_
and is common on the shore, as are the bullhead or father—
'lasher (Cottus bubalis), with its”_large head _armed with
four formidable spines, the ve'—bearded rockling (M 01561ch
.
mustela) to be recognized by
‘
the ve barbels under its
snout, and various kinds of sucker-sh (Lepadogaster),
whose hinder_ (pelvic) ns areunited to form a sucker by
means
of which the sh fastens itself to rocks.
'
"
In holesand cracks in r00k live.w0rms of various kinds,
also a quaint ,crustacean called Gnathia and the little sea
ghefkins (Cucumaria), which can frequently only be removedby splitting the rock with a crowbar.
Here, too, are rock_
boring bivalves, especially the common Saxicava, though
'
the large
Piddock ”
’(Pholas) and some
its smaller.
allies are common in some parts.
'
-
There is no morefascinating or more beautiful spot on
_
the shore than a typical rock pool. "Its sides and bottom ‘
are usually covered;
a
carpet of weeds,
,
sponges, hydroids, sea —matsand seasquirts, amongst which,
like owers, glow the rich colours of anemones (Plate 16).
'
The coinmonest of
no means cônned to the pools
‘
but common on the higher parts of shore—is the beadlet
(Actin'z‘a), usually a deep-red or-broWn, but sometimes red
with green spots (the strawberry- variety) or, less frequently,
a bright green.
At the base of the tentacles is a row Of blue
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