REGULATION OF FORM AND
91
lÇt is not easy to follow the intrieacies of the many movements .
in a sh’s body, but simple andna‘cural picture” happens to»
be present in the 'ç016ur marldngs-bf various
_.
pigment
is not altogether due ”to
the
the body; às
'
'
of thetissues for example, havealso tô‘be takeïj£ito àccounç,
the
of the
'
clearly seen. In the ‘Chætodontf Holocanthus(PlX)tbe
centre of gibtiVity o‘bvioùsly lies 111 the caudalregron,om
of fofCe, as firepresented ;by themarlungs,
spreàd
:£orwards, baClâWàrds, and abôVe and belowm
very
“lines and
The line from Îthe
’
to the middle of the taildivides the body into equal
'
and below. Ï From the pectoral region forwade
ad 'on the "rail the
by almost straight, ,
xœrtibal lines, showing that:themovements here
from
,
"“ÎSiüde _,to side; _The vibratingmovementsOf the”dofsal and
Ï analare'also represented “in the crossing of the curves fiat
'
'
.
-
"
'
,
=
màrkings,' we may believe;
'
the seàles; by the wnkling of the skin—causedby
.,
of;gthe muscles undernéath._
The
; probabiyrepresentthe zones of
reSti'th6 11ght" ;
Ï moves,whtheforwardmovementapprOXlma‘celyequal’o
this lockmgmwement Iftherocklng movem€‘t lsthe '
greater, horveve1,thecurveswould'bïéàk up î{frj1—îto spots <0f
various
aSIS seen
? Argus;sh,—
Ï_
féŒàrädä{rnovéäèñ£ leàds “to the
*
'ÔftnbthyngShlnt
connectedmththebalancewehavetoconslde‘ïeongm
ëof ,th‘eä pa1ednspectoraîsandvætmlsluthetrue —
,
verticàlnslatlstosayfrommusclecellsorbudspressed
out -alogï the-yen‘t—ràl marg1nButwhrlEthevelcalns
_
are'fôrmëd of … h11b1ggt
—