GENERAL CHARACTERISTICS
19
product, that is, the
Were deposited in Various
places of the body instead of being excreÏted—io the extenor
Andin common With _gnanin lime is often present 1nthe
"
internal tissues ôf theésh, as
in the retina of the eÿe, peri—
toneum, air—bladder; CÎÇa
see'hoW the wa$te pro—
‘
ducts of metabolism have Îbéen made use Of
inf'building up the—ir sfci‘iiÇture and producing the’ii‘*Colburs;_
The pigment of the chrbïatophëfeshad iprobably,a
origin, and
note that
a_parbf îih‘é esh is
'
injured, eitherÏrom without çr,by the unequal Working o£
ÏË
the muscles on the skin or
_
assenïbles
The
of %h‘eblood are rerhoving the
convertmg
'? '
-
them into sub3tances that appear tousas
plàCing them in the skinWhere theyÇandô;no' hai‘m;
:
The distribution of the chromatophores andmdocyæs
in -_the skin of ”the sh is Verÿÿ_
,_
signié-ain‘t.
_
Thus,m
the'commou ëhe3 like the Cod”, the darkercolour oftheback »,
.
is due to
great abundanceofthechromatOphores,which
r
-—
of
thé fays0fhght “the
'
sides aremoregreylshor silverÿ, thechromt0phOresbecom
,
,
1nglessabundamwhst the mdecyiesfmmam@fô con—.
'
nectediayer®nthebylasythechromatophœesare «
quifef àbëëf» andtheldœyæsform ÏadSêC°’üü°üS—zï
-
,_
‘
layer, called
Th1s13 în thedeepel‘laYü'0f
the skin and givçèî
dead Wlfé or Silveryappearanœ,
While
of the outer layer producethe irid—escén‘çeîï‘
-
This distribution is in-keeping
”.,—pigmentis‘essenîially a WaSläe product stored up
_
ofthedermrs _‘Nhere the _rays of light are able to operate
Qn thecells
Îê‘tu becomes
gustas _.
thegreen
mafær
Wheretheraysdon0‘coperateasontheul1def81de°fShes
'
_
espesisàÏlliï,—" 1tshesandRays therelsn0thmgbutthedead ’
wh1tenessoftheargenteum Thebhndcavesheshave
'
îÏËÎÎ"Èî—
r…,