6
THE BIÛLÛGY. OF»FISHES
"
‘
Î — Ï The ceinpreSsed, tofpedo f0rm is onlyone of many:We
_
among the _shes. ' A par‘çial list of the; others Withsdme
_
appear asiolloWsz—
::
T
»
Anguilhfwm,
like an
sore‘ ;Blenhies,
:
_
,
_
.
LÿCodidæ, Lùg»slïes;
,
‘
,
»
'_Deprèsszfon, attened from abbve
.
_
Rays; _
,
Diiczfbïm,
from
" sidé+Flat—sheS;
-
.ÏÎScorpidîdæ;
_
_
,,
j
,
-
'
' ;
_
Globzfmm,
or
,
Porcupine
, Abul_éiforn1,',needle-shaped—Pipe—shes;
'
-
Tüemf07m, like a
or
'
]
Band—sh, Maérüds ;
Sagittÿ‘orz, likeadatfç—Pike“;
‘
'
_
and so on.
to describe
them,_
mig”hteasilÿ bei doubled.j
'
î*
»
HOW this WealÇh1îof fèr_ni’has‘ärisen màyibç‘ underst00d
perhaps from the folloWing consi'deiatiôs. The“-aim
a
_
.
Ï j-'Ï "
Shis to move, and
,
_
°
as quickly as possible.
.
__:
_
To this end it has
,
-
-_
»
,
developed the mus—
'
cular ,,œgion; 0fÿ;ih€'
…
tathusrestmung 1
,
,:îi
:= f—:,
mereandmorethe
'
spacef0rthed1ges
.
—
t1V€0fgans Letus
'
‘
,…;») _.about-i_the'nddleof
benghhetheæ muscleeehangéë» Will
f
…
bang 1tfurther ÎOÏWÊÎCËŸJIËÊÊÎÏ‘Ë:fhe_z head;
,
This; iii— itself
,lmfÊ?ns a}c_=hange Ôf
becOn1eyerÿlo_ng
,
,»°Ë ;-fasymmèüiëäl Ein: {the :
ànd‘ push forward
—I
'-:theheaŸièrÿ:fronäf—snd:—@f
The latter Will
'
'
'
ffom Side, gt0 ŸSÏdÔ»îàndinSteäd of; going faster, the_,_ShaWiil.