DISTRIBUTION IN TIME AND SPACE "à43
occurrence
of Several species of Anguilla
‘
in 'theÿIndia
Ocean and “Eastern Asia makes it improbable; The more
probable line of immigrati0n for the. Eels has evidetly
been across the plains of Syria, as
,
'
-
Of the remairng
'
Ï
to South America, Africa,
Ï
few now
remain in the
_«
fossils have been obtained from the
'
'
Ÿ
of North America as well as Europe.
*
also exist in MadagasCar and
It
therefore, that this group Originated in the Indiaregidh=ân
pre—Tertiary times;
,
,
The last group of the Osta1‘i0‘physit0 be'-rnentione‘d,the
:
Cypnidæ, is only found in thenorthérn hemiSphe’r‘e', froni
India and Siberia right across Europe and North America
Â
The fossils have been found in the loWer Tertiary, ofNorth; ï
_
AmeriCa. ' It
therefore, that this
'a—tisfen after the separàti0n of.
Africa, and the Cyprinoids
'.
Europe into Northÿî—Amer—icÿa
Ï
":;
_
(Fig,
7 12
.
course';cïŸëfi-tîïçaÏBering5ÿ‘Strasçi‘vvhenf=ASia;
1
,
AlaskaAsthetemperaturesabng it—he latterroutewere
; pobablyt010Wfrthlsïndlngf0dptsmfehk1ÿthat ?
-
thyfwdthmhnnlth1dGndd,—a>
'
Dipoi;
'
,
is,_1that the pecùliar
_
Which is characteristic of the Whole group of Ostariophy3i, ; '
arisenseparzätely in*dierent groups in different
,
—_
È? partsof the World ; thus, in the Cyprinidæ of the
,
_,
Ind1aandiîgthe
Of “South
wouldbeextraœdmary,1f We co‘uld not explain 'itjbÿth6
—fàct
t1have come from-the:SàÏiiæfpelaglc
'
’
mari—ne‘ëarîfd?!ifriésghÿvaîterîstock; the; Clapeids;
'
EI
have 1ndmatmnsorrud1mentsofthea1rhladdercon
_
Ÿ nection;
î
thegroups so farmentxonedhaveamoreor
;“
restricted
i j ï