»
»
-ONASCIDIANS: AND soon-rrsn'ns.
21;
It would appear, therefore, that for ages the inhabitants
'
the sea have largely used the cuttleshes as food,and to some
extent man,
both as food and bait, 'yet these active 'and
generally pelagic forms have not been extirpated. The com—
mon species seem to be as abundant as formerly, though their
appearance is at all times uncertain.
They occur, like so many
oceanic forms, suddenly in great numbers on certain grounds,
destroying the fishes on the hooks
boldly rising to the
surface after their prey as it is drawn up by the sh6rmen.
They also ocCasionally seriously interfere with the success of
,
the herring shing (as in 1897) by appeang in great numbers
‘
--to
the injury of both shes arid nets. In the deeper
waters of the Pacic as well as in the Other great se‘as they are
°
abundant, notwithstanding the constantwarfare of whales and
shes.
This is
due,-as already indicated, as much to
.
the vastnèss of the area of their distribution, the depths which
they frequent, and the provision of the
cloud, as to the
a,…
protection of the eggs
in tough capsules, by a shell or by
;enveloping mucus, and the pelagic young A few, again, have '
Heating eggs, and thus the means
their increase are both
varied and extensive as well as beyond the inuence of man.
The group
of the Urochordates_ offers few points for remaÏk
—except that there is no sign of exhaustion in the common
forms within. tide-marks and beyond it.» The enormous num—
bers of the pelagic appèridicùlarians and their gelatinous houses
*
is one of the features of the ocean, which in certain. places is
'
,
discoloui‘ed by them.
-Moreover,— they feed on microscopic
'
—
_
plants, while the smaller shes and other forms prey on them.
_
The cycle betWeen- oceanic plants and shes has therefore more
—
than one illustration;
In this and allied groups the larval form
_
is often more conSpicuous than the adult, thus the larva of
_
leronis abounds in St Andrews Bay from July to September,
'
yet…theadult has never
found within it.
_
"
*
_
We now come to the consideration of by far the most
£
'
in relation to man, viz., the food—shes of
_
comprise the ordinary round shes, such
the codand
,
thé herllg, the various kinds Of‘àtShÇS, theSkaæ
»
-ONASCIDIANS: AND soon-rrsn'ns.
21;
It would appear, therefore, that for ages the inhabitants
'
the sea have largely used the cuttleshes as food,and to some
extent man,
both as food and bait, 'yet these active 'and
generally pelagic forms have not been extirpated. The com—
mon species seem to be as abundant as formerly, though their
appearance is at all times uncertain.
They occur, like so many
oceanic forms, suddenly in great numbers on certain grounds,
destroying the fishes on the hooks
boldly rising to the
surface after their prey as it is drawn up by the sh6rmen.
They also ocCasionally seriously interfere with the success of
,
the herring shing (as in 1897) by appeang in great numbers
‘
--to
the injury of both shes arid nets. In the deeper
waters of the Pacic as well as in the Other great se‘as they are
°
abundant, notwithstanding the constantwarfare of whales and
shes.
This is
due,-as already indicated, as much to
.
the vastnèss of the area of their distribution, the depths which
they frequent, and the provision of the
cloud, as to the
a,…
protection of the eggs
in tough capsules, by a shell or by
;enveloping mucus, and the pelagic young A few, again, have '
Heating eggs, and thus the means
their increase are both
varied and extensive as well as beyond the inuence of man.
The group
of the Urochordates_ offers few points for remaÏk
—except that there is no sign of exhaustion in the common
forms within. tide-marks and beyond it.» The enormous num—
bers of the pelagic appèridicùlarians and their gelatinous houses
*
is one of the features of the ocean, which in certain. places is
'
,
discoloui‘ed by them.
-Moreover,— they feed on microscopic
'
—
_
plants, while the smaller shes and other forms prey on them.
_
The cycle betWeen- oceanic plants and shes has therefore more
—
than one illustration;
In this and allied groups the larval form
_
is often more conSpicuous than the adult, thus the larva of
_
leronis abounds in St Andrews Bay from July to September,
'
yet…theadult has never
found within it.
_
"
*
_
We now come to the consideration of by far the most
£
'
in relation to man, viz., the food—shes of
_
comprise the ordinary round shes, such
the codand
,
thé herllg, the various kinds Of‘àtShÇS, theSkaæ