'
_
; ADAPTATION
'
*
'-=267=7
Siluroids, sothàt the barbeis come to be very…useful
,
ing the food. In the case of the Silufoids, as obsefVedin
aquaria, the. sh seems quite-dependent on the.bàrbels or , '
other taste*organs of
for the 'det—‘eCtion of
'
In the Rockling the Vib1‘atilé
eurrents along the dorsal n 'gr00Ve,'thich—' is“ 1'inèd5wh
taste buds and -is a food—detectingmgan.(Thomson,
j
-
The long, spade—like snout
'
is supposedto be of- use in sûr—ring ”up theÿmudWhen the
,
sh isSearchingfor its food. Butthe
.
'
the Chinese rivérs is Said not
snoù—t
‘;
in fact, the sh Seems to be greatlyftinc0nvenienced by:it::
"
'
And We know, of. c0urse,Ï that the -Carpsj …ca'n .stir up the mùd —
.,
,
Without & snout.
.
"
.
'
..
One of the most…peculiar adaptations connected With
the head
region is the enormous sucking-disc .acquifed
'
by Echeneis and Remora, by
_
‘
.
,
,
'
1_7'
,
means of Which they
'_ ;
'
themselves
.-_Ë;îi'._,,
3Ë,
.
andmoreespeœallySharks
'
but1tmayhavemsenque
mdependentlyînaddum
'
°
”to the
snetion*it
:' —Ë
gets a
hôld::byfméans…
Ï
', _.
'
-
of twenty transverse dgés,g
*
_
'
1_
and_the small sharp.spines ::
.
WlthWhiCh the$e are
-
FIG. 67.——Sùcket of
,
V1dedThe
_
Spines point ' Œf0m N6VY
York Z0010gicäl S°f
.
_
_
_
,
_
:
Ciety Bulletin.)
..
,
—j; baekwardsgêzsso that
the
.
.
,
,
_
»
Î
forward; becomes more rny
_
xedAndsuchîgis.,:çthe ,cha=raetet of the; sh,that1t
,
ràther‘_thän :let£g0, andsomeümes
.
handledontheobjectto
;
‘
,
Which it.—was-'Ïattaehedgi_çîiiS_ubh
'
‘
and ;a' half
_
,
(}.».M-.
_be