GENERAL CHARACTERISTICS
13
structures
different ways, such…Î a moderate swimmer,
became modiedand gave, rise to all the different forms of ' '
the present time.
It
certain that these, pelagic
of moderate Swimming powers have remained more
constant and similar to the earliest, most
shes
than_any others.
«
'
,
,
.
,
‘
'
'
*
3'. SKIN AND COLORATION 0F*FISÈES
'
'
'
_
Apart from the shape of a sh, the characters that impress
us mOstare its Slipperiness, the bright scalesÿand the colora—
_
tion.
Taken together these are more than a simple covering,
they make up a dress Every sh has a covering of some sort
but there is an innite‘variety in the make—up.
_
Still more,
what is good enough for one sex or season doesnot do for
another; , SOrne shes are.drab all their lives, others-become
brilliaht at least once a year, and others again are brilliant
all‘ the time, In beauty and play of colours, -andæiri the
_
control of colour, the shes are superi0reven totbirds 'and
insects, yet it must be -admittedthat our common =shes '
are
not of,,this kind ;, to conrm the picture one must go to,the
-—
visita well—equippedaquarium. ..
.
,
_
'
'
LT,Âhe
gof
from a secretion; of the
'
and probably :in,
_
in different species. A smgle Hag—sh :_plaŒd in; a; bûcket'
of Water soon turns it into -_a'thickjjelly»of
beneath which it hides itself. The mucus is secreted by
"
cells of the outer layer, or epidermis, which form pits or
glands oPening—_to the surface. It is a
thing, worth
_
-
noting, that allthe sense organs have been derived inthe'
same way from the ,.-_epidernial layer.
i'nfjfact
,
glOried mucus glands; The lattermay—bei distribùted:—,äill
_
over ;thebody—and‘ head with;a mass of nerveer Sense cells—_
'
at their base, :as
'
'
_.gIn this wày,has
:
of shes; and ._frogs,ï Which… was
juSt
'
'
'
a connected; series of mucus glands: Ï;_' The
,
-
readilÿ
,
_
13
structures
different ways, such…Î a moderate swimmer,
became modiedand gave, rise to all the different forms of ' '
the present time.
It
certain that these, pelagic
of moderate Swimming powers have remained more
constant and similar to the earliest, most
shes
than_any others.
«
'
,
,
.
,
‘
'
'
*
3'. SKIN AND COLORATION 0F*FISÈES
'
'
'
_
Apart from the shape of a sh, the characters that impress
us mOstare its Slipperiness, the bright scalesÿand the colora—
_
tion.
Taken together these are more than a simple covering,
they make up a dress Every sh has a covering of some sort
but there is an innite‘variety in the make—up.
_
Still more,
what is good enough for one sex or season doesnot do for
another; , SOrne shes are.drab all their lives, others-become
brilliaht at least once a year, and others again are brilliant
all‘ the time, In beauty and play of colours, -andæiri the
_
control of colour, the shes are superi0reven totbirds 'and
insects, yet it must be -admittedthat our common =shes '
are
not of,,this kind ;, to conrm the picture one must go to,the
-—
visita well—equippedaquarium. ..
.
,
_
'
'
LT,Âhe
gof
from a secretion; of the
'
and probably :in,
_
in different species. A smgle Hag—sh :_plaŒd in; a; bûcket'
of Water soon turns it into -_a'thickjjelly»of
beneath which it hides itself. The mucus is secreted by
"
cells of the outer layer, or epidermis, which form pits or
glands oPening—_to the surface. It is a
thing, worth
_
-
noting, that allthe sense organs have been derived inthe'
same way from the ,.-_epidernial layer.
i'nfjfact
,
glOried mucus glands; The lattermay—bei distribùted:—,äill
_
over ;thebody—and‘ head with;a mass of nerveer Sense cells—_
'
at their base, :as
'
'
_.gIn this wày,has
:
of shes; and ._frogs,ï Which… was
juSt
'
'
'
a connected; series of mucus glands: Ï;_' The
,
-
readilÿ
,
_