‘
—
261
time“, we may believe, the aptitude Will- arise at earlier
'
periode until even the young have long pectorals, like
Exocœtus.
How long it has taken for such.a character to
develop Can hardly be told ; , perhaps _ a thousand years or
more, for only the aptitude, and not the acquirem'ent, of one ' '
generation is handed onto the
Imitation and example
are probably of more importance than the Structural
inheritance.
’
_
_.
_
-.
’
{
Again, when the Rays took to eXpanding laterally it
…was not part of this adaptation to a bottom-life that the
.
arms or Wings should become attachedto the sides of the
,
head.
In the Monk—sh(Rhiña) they are quite separate,
,
FIG64—TheFly1ngGurnard—(Dactylbÿterus volitan$j does
'
—'have
pectoràl- ns, in its youth.
It has.
Ÿvigoroùs eorts at ying.
'
_
'
_
_
and this sh has a much narrower body than aRayÇ When
'
this regulative change was made, however, it led to
a wide
»
expansionof the wings, which in the Vampyre Ray may
'
ÎÏreaCh a—Width of twenty feet or more; with these wings
:
prey. before devouring, it. -
“;;, l',:ln
story of adventures o the
rRussellf'}.
the immense
"
or Vampyre Rays
called.._
known to_
As
very dangereus ,
at clee
'
'
easily Smash a bOat î- In"
sh happened
,