DISTRIBUTION IN TIME AND
SPACE 237
a
number of modern Atlantic, as well as Pacic, forms,
occurred both in Europe and North America. Their teeth
have been identied from Patagonia, and the distribution
"
of the modern forms would suggest that they came in
from the South Atlantic.
Yet the teeth have also been
found in Egypt. Again, Belonost0mus of the same period
also had a very wide distribution, from =Queens1andÎ-to
Europe and Mexico. It occurred also in the UpperChärlk
of Brazil and thus seems to have come from the sOuth.
_
Yet it has likewisè been found in the Lower Chalk
,
,
Carpathians, though like the Protosphyrænidæ it does—hot
'
_
Occur in the Lebanon Chalk.
Similar Ïdil_Culties Willlbe
noted when we come to the freshwater shes.
'
.
;
“
In some cases, however,there is a greater probability
'
in ”favour of the South Atlantic entrance.
Chirocentru‘s, .
a
near relative
"
of Clupea, has its home in the Eastern
Archipelago of the Indian Ocean, yet the fossils have been
'
found in theUpper Chalk and Eocen<äof Brazil.
,
Ichthyo=
,
‘.
dectes,
for—m‘,- has been found in 'thejUpper
.,
_
Chalk of CaméroOn andVaripùsr,ElOpidægoécül,ifthèChalk; f
of£iBrazil.ÿ ;; At
sp Baiesl'0f ÊElôpidæï
ï
_
-
occurothesouth—eastem COast‘sï of North America,thë
_
Westlndies,West ;îAfrièa',‘:andionQ species in India; , N
?-;
'
trace
been ï;‘dis<30vered in thel\led1terranean .
,
—'
_. Ç -
'
region; TheSe
-,
'
tion since the Chalk “and there
that the whole of the Scombroids, Tunnies—,Sword-sh, and the Sail—shes, etc., arrivedby the Same
,
route;
These are the pelagic shes par excellence of the
'
present day and their range extends over the whole world.
;
{Another large and valuable group, thatwe probably-owe
'
_
-
to this Southern route is that of the Anacanthini or.Gadoidägg ,,_:g
\
;
Remains of these have been found in the Eocene o_f_Europe …
and North America, even, earlier
_
land was’not yetseparatedomScanànaVlaandtheyhVe
not
?:“
little doubtthattheycarnefromtheSOU—thB@ul€nger
? I