_
! ADAPTATION f
processes are the usual means. VJhel*e thehody
and the movements are
the BlenmÏè3
and Ribbon—shes, theloeking Spinesare hardly developed ;but in the Mackerel, Tumes; and
the spines have become huge—looking»processesOntne
'
—
other
in the
f. "
which have developed :a ;.die‘ref‘c" mode
,ÏÎ
spines are but little
:
?
f
; 1
Whilst the struC‘cu-re of the
:
referred to
of the
moVe1et—, — 1 f '
the head and anterioripart
impression
'
,
of the resistance of ;: thèfWüen In 'theitds‘t .pdWe-tfu'}
_
,
swiminerS
moisi
=
above tha- below, and even the sides of thebody are
_
'
pressed, '?so that ’theb‘0dÿ is no longer torpedo-shapedin'
section bùt rather a broad, oval.
Further, the jaws
pr‘es'sedtogether and:eovered Over by the skin and: broad
süb0rhitàls in such à way thattheypræ'ét— gimi_nimùz :£ôf,'
resistancef'wîthc
Îf
f01dedback0ut0ftheWäYWhenswmm—mg
pbeenarrvedathtomd1icu1üesthe
closmgmusdeshaveœbecoordlnated toamcetyIn
_
otherspec1esthefeebledevelopment0fabsen030ftæth
'
'
*
resulted in the fèr@tionæbf gloss- SnOutasmthesa8h
—
\ ;
and Sword—sh.
other
7
has led to a temporary closing of the ihouth”(äs inthéPipe'
'
_Shes and Flat-shes),and this to a great elongation ofthe .
bgdleth
in mimber of the vertebræ, loss of the
"
ventralnsandeven of the caudal…
canfolloÿsucha
LepidoPus, and Tnch1urus
f
L
Indefault0fteeth "fhowçVer,
,
S_W0fdshmakes a ‘
,
1 _
pluft1ngnut HerrmgMackerelandCutieshesandWlthshafpswmgs fÏ
.
=“
to,
,
thghtnd1ftutthmnphhtâ—
_
Convenieny
into