156
THE _BIOLOGY OF FISHES
water to : greater distances and because the remarkably
,
telescopic-eyes of some deep—sea animals seem to be peculiarly
adapted to their perception. (7) These long ethereal waves
,
—
may (if not too long) be of the nature of (ultra—red) light,
or (if longer) of the nature of electricity.”
That the radiation from transformed
cells
may be of the nature of electricity is clearly proved by
Malopterurus, the electric Cat—sh of the Nile and other
African rivers.
Here the glandular system of the skin,
'
which surrounds the whole body like a gelatinous coat,
"
has been _converted
powerful electric organ with a
',
strength of over 200 volts. The interesting thing is, that
alth0ugh. formed from a seemingly different tissue the
Ï
structure of the organ is precisely the same as that in the
Î
Other electric shes, Where it hasdeveloped from the striated
'
'
'
Here also the sh is of a sluggish disposition
'
_
-
_
:We may take it as certain, that the orgàns emit an ' Ï…:
emanatiOn of some'kind, but we can no longer believe that
,
they are an adaptation to the abyssal and dark depths; of the
On the cotrary, as mentioned above, their develop—‘
.:
ment and production of energy seem to dependon a certain
'
amount of
and heat, which are obtained nearer , the
,
surface.
Whether they serve any purpose
the shes and
…
other animals possessing them—, must
:an :Open
—
question.
.
,,
'
»,fÏ.
_
_
'
,
?“ This negative
regard-io thefunctlonof
"
these
is
'
rèa'11ÿaùè 'togÏthepîeSenceof bacteria.
,
.ŸIjPhotoblepharŸon,ÈaîPercoid described by ‘M‘àX Weber from
; » '
theMalayArchipelago, Bùéhr—reffound’that the gland cells
i
ï
were
he Suggests—that the presence of
—
_theSe has Stimulated'f‘t‘he surrounding tissues to developin
_Ï
the'eXtra0rdmary manner described above. There is nothing , ‘
.
_
impossible 'or even improbable ’_in this, for We know how
,
cells*have a way
of growingover foreign bodies,forming
cysts and hardenedl‘ayer3 of skin. And this view iscer'— ' _
tainly in accord with the“observatiOns of Hjort,that these
,
_.
,
,organs—are restricted tothe upperlayers of the WarmerWat-Œs.
THE _BIOLOGY OF FISHES
water to : greater distances and because the remarkably
,
telescopic-eyes of some deep—sea animals seem to be peculiarly
adapted to their perception. (7) These long ethereal waves
,
—
may (if not too long) be of the nature of (ultra—red) light,
or (if longer) of the nature of electricity.”
That the radiation from transformed
cells
may be of the nature of electricity is clearly proved by
Malopterurus, the electric Cat—sh of the Nile and other
African rivers.
Here the glandular system of the skin,
'
which surrounds the whole body like a gelatinous coat,
"
has been _converted
powerful electric organ with a
',
strength of over 200 volts. The interesting thing is, that
alth0ugh. formed from a seemingly different tissue the
Ï
structure of the organ is precisely the same as that in the
Î
Other electric shes, Where it hasdeveloped from the striated
'
'
'
Here also the sh is of a sluggish disposition
'
_
-
_
:We may take it as certain, that the orgàns emit an ' Ï…:
emanatiOn of some'kind, but we can no longer believe that
,
they are an adaptation to the abyssal and dark depths; of the
On the cotrary, as mentioned above, their develop—‘
.:
ment and production of energy seem to dependon a certain
'
amount of
and heat, which are obtained nearer , the
,
surface.
Whether they serve any purpose
the shes and
…
other animals possessing them—, must
:an :Open
—
question.
.
,,
'
»,fÏ.
_
_
'
,
?“ This negative
regard-io thefunctlonof
"
these
is
'
rèa'11ÿaùè 'togÏthepîeSenceof bacteria.
,
.ŸIjPhotoblepharŸon,ÈaîPercoid described by ‘M‘àX Weber from
; » '
theMalayArchipelago, Bùéhr—reffound’that the gland cells
i
ï
were
he Suggests—that the presence of
—
_theSe has Stimulated'f‘t‘he surrounding tissues to developin
_Ï
the'eXtra0rdmary manner described above. There is nothing , ‘
.
_
impossible 'or even improbable ’_in this, for We know how
,
cells*have a way
of growingover foreign bodies,forming
cysts and hardenedl‘ayer3 of skin. And this view iscer'— ' _
tainly in accord with the“observatiOns of Hjort,that these
,
_.
,
,organs—are restricted tothe upperlayers of the WarmerWat-Œs.