‘
FISHES AND THE WEB OF LIFE
297which unite in front of the mouth.
The swolleu ring of
tissue thus formed surrounds and is united to a thick
papilla projectihg from the skin of
And the
union of the tisSues is so complete that the vascular system
of the female becOrhes_cotiuous With that of the
Though some
pass; into the mouth, ;atàthe
corners and the male thus
respiratiou,in other Waysit is quite dependent on the féiñàle.
'
It takès'in »j—n‘o food by T’che .mouthz; the digestive tract
remains rudimentarÿ and undeveloped; the liveris
rently absent, and
«
neys are;pfeSen ; The dWar‘f male; we1h‘ay Say,has become
'
part and parœl of, the ;
oly*the Sexual '
,
organ, a single
as evidence of its
individualit—y. ' *
Since the males are thusundeveloped,‘Regan,thinks it p'ro—
_
bable. that they succeed in attachig themselves to the female
,
-
Whilst Still iii the larval condition ,_o_r. shor‘tly after.this stage.
'
_
=
A ,curious.ginstanee of symbiosis ,is;:given by :the_small
,
-
Bittëingî‘
Central E@@Pë#gf=Thää , female
,
,
'
POSÏSfeesêLsÏ;Ez=àa£1®äàëèñiëàlàèÿâiäî11a£êdüfig£:fcÏhéäîbrèediägfse'asons
*
?
frydevelopunttheyolk-sawsabserbedabout a"moth,
fhesun oftheRhodeusHeretheybeœm‘3encystedand
«
develop into young mùSselS.l
titfor tat,’,’ than trùe SymbiÔSiS;—* ,'
,.
_
,
,
stages to ,parasitism îis but a“ short step; ‘
,
Forexample, a small» Càt—sh
Stegophus,
1nserts1tself1nto
'aiÎlärger
suCk_s the blood of its host
,
As already
_
,
the Hag—sheS
,
preys have devek3ped this habittoa
—ÇX΀Ï1,È
Theymanagetogetholdofthær preyCodFiounders or *
Salmon, When these içgfe;restihgger caught0nhn€S,andbœe '
their Way
theyËgountllnothlngisleft
f
but the
‘
,