238
;
jTHEÏ_BIOLOGY OF FISHES
'
-
from,deep—seal forms like the Mac'rurids, but it is possible
='ïÏ”
that the cosmopolitan and less specialised genus Merluccius,
which occurs on the_West.coast of South America and in ;; ; -
Zealand, as well as in the North Atlantic, might
:Ï
have been the original form.
On the other hand, the Rays and Dog—shes,
jjï
_
the coastal forms, Blennies, Cottoids, and Gobies, perhaps!
also the Labroids, have come to Europe apparently by the
eastern entrance;
Romains of the rst ve groups have
been found in the Upper Chalk of Persia (Priem) or the
_…; :Ï
Lebanon.
,
It is probable that the Carangoids, Stromateids, ‘
and some of the F lat-shes, Soles and Turbots, have come
by the same route.
…
?
_
-—
In- _all these cases., with exception of the Gadoids,;the
Eùropea—n for; North Atlantic —fauna is poor by comparison ÏÏjf
that of the eastern part of the Indian Ocean, and there '
see‘ms- no doubt that after the European waters were
depleted of their stocks during the changes noted above,
'
they became occupied by new—comers from the south and
survivors from the east.
One of these survivors seems ,
_
have been Anguilla. This is said to be represented in the.
Upper Chalk of the Lebanon and. it also occurs in the…»
Eocene of Mt. Bolca. It could not have enteredthe Atlantic
'
from the north and its entrance from the—south is rendered
—
improbable bythe fact that “the genus does not Ocwr in the
,
SOuth
Related forms—occurïin
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_
: —, 1 commont0theMemterraneanandthelastmenuoned
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ha31tstrue home—' in the
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.It:ä_Seemsî
the, “Eels entered» the
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North Àati© Waters from ‘=;îîel east bef0re , the ' southern
î.
entrance
there ;béfore
:.iÿii—g‘
North ?;Amcric'a separafèdgïfrom. Europe.-'
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and. Euroiaçeai-r‘iaiEels .;aî1df
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