'
_
,
CORAL REEFS
‘
161
_
future only to maintain and reproduce itself, bùt if it ‘:îis'a
colonial,
it is only in the very earliest
stages of its development.
Division begins after the fashion ‘
shown in Figure 33, small individuals buddin‘g’0f from the
side of the rst—formed polyp. This_may then continue ,
to grow upward, increasing the height of the limy C01um1=,
and budding o side polyps as..it goes, the origialpbiÿP
forming the apex of the whole colony.
_
coral growth, the aPical polyp,; instead Of being the_Original
and oldest one, is the
'
from the polyp immediatelybeneah
short—lvto be *
‘
'
superseded— when. it
_
,
f
…
‘
f
;_
1
'
'
produoes a bad in
Êë"
_
’
its
turn.
'Many.
‘—
-
»
«ÊË
_
Ï
other oorals have no
:
»
f'_\_—r " J
’
specialized point
?
.'—'. —
.
'
growth,allthepolyps ;
'-5}'
_‘
having equal Powers
:
'
_
'
of division and hud—‘
°À
":
l‘ïz'
!
*
:
'
ding,
__
…
_»_…:
:
cases… «the - colony»
…
‘
'
spreads m a regular
:_
_“
: :
.
face of
.
ÏSténes
ç°m
underlying
{‘ deàd[
,»
‘
“
coral, nal—ly iorming
mass such as ':‘_’Ëh‘&tf— ‘r1isuäiäÿ
assumed _by the
:”iIH some
cases the division,of
”;
.
_
instead
surfaoe_… jQf the. ;-:
With
.many .--1ii:tle
‘
«
it
.
:mÊâY Lbe ;
5
Wanderi11g, >-“si1iubs
ëmoves:all
'.
“
'
site of polyps Which have :e‘xtènded themselves
’
0fàf but .,Ï'never ‘iäartäd‘lœmpmÿ ’Nfh i’i“
"